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HUSSAM A. ALRAMADHAN
Project Management Time Management Decision Making Managing people Supervising Thermodynamics Fluid Mechanics Manufacturing and Design CAD Soft Leadership Control Budget and Scope Management Communication Planning Photoshop Photography Leadership Scheduling Cost Control Risk Management Contract Management Critical Thinking Project Recovery Negotiation & Communication Quality & Safety Management
HUSSAM A. ALRAMADHAN

Hello I'm HUSSAM A. ALRAMADHAN

Project Management Time Management Decision Making Managing people Supervising Thermodynamics Fluid Mechanics Manufacturing and Design CAD Soft Leadership Control Budget and Scope Management Communication Planning Photoshop Photography Leadership Scheduling Cost Control Risk Management Contract Management Critical Thinking Project Recovery Negotiation & Communication Quality & Safety Management

About me

HUSSAM A. ALRAMADHAN

Eastern Province, Saudi Arabia

I am HUSSAM A. ALRAMADHAN, PROJECT MECHANICAL ENGINEER from Saudi Arabia. I have rich experience in Project Managment.
Career Highlights include:
Multi-skilled and technically competent mechanical engineer with 10 years of career success in managing multiple technical functions with reputed companies across industry Proficient in monitoring NDT activities and preventive, planned and predictive maintenance to optimize machines availability with constant endeavors to realize ZERO downtime Good communication and presentation skills with good time management skills. Self-motivated and goal-oriented individual with flexibility, creativity, resourcefulness, commitment and ability to perform above expectations Highly motivated, positive and goal-oriented, with a high degree of flexibility, resourcefulness, and commitment to work Self-driven, disciplined and result oriented with fine-tuned analytical and troubleshooting skills. Demonstrated professional excellence in the areas of project support, technical specifications, and monitoring to ensure execution within scheduled time and budget

  • 14 Years+ Job

    Experience

  • 300+ Projects

    Completed

  • 150+ Meetings

    Successful

Why You Hire Me?

I Am The Best PROJECT MECHANICAL ENGINEER in the marketplace

What My Freedom Client Say

Resume

My Professional Work History

JULY 2019
Project Manager

DIHAR UNITED COMPANY
Construction of Fire Hydrant Water Pipe – National Guard

JULY 2018
Project Mechanical Engineer

LTAREQ ALJAAFRAI CONTRACTOR
Construction of East Damamm #2 Substation 115/13.8 KV

2014 -2018
Sr. Mechanical Engineer Interface Manger

LARSEN & TOUBRO CONSTRUCTION
Spearheading the Power Enhancement project from 13.8 kV OHL, SAPRE – Uthmaniyah & Hawiyah; and replacing power supply from Wasit Cogeneration Facility to Abu-Ali Plants (Jubail) 230 KV

2008 – 2014
Field Inspector

ASACCO COMPANY
Handled the project of operating and maintenance of JTI complex while spearheaded the inspection of the pipe, heat exchanger, etc.

My Professional Language Skills

English Fluent

Arabic Native

CERTIFICATIONS & APPROVAL

Project Management Professional Introductory Course, 2018

Saudi Aramco Work Permit (Receiver) Program, 2019

Saudi Electricity Company (Proposed Mechanical Engineer), 2018

Royal Commission Jubail & Yanbu (Felid Inspectors), 2008

National Fire Protection Association (NFPA), 2018

NFPA, 20 Standard for the Installation of Stationary Pumps for Fire Protection

NFPA, 25 Inspection Testing & Maintenance of Water Based Fire System

NFPA, 13 Standard of Installation for Sprinklers System

My Education Background History

2017
Master Degree in Engineering Management

KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

2013
B.S Degree in Mechanical Engineering

PRINCE MOHAMED BIN FAHD UNIVERSITY

2007
Diploma in Manufacturing Engineering

JUBAIL INDUSTRIAL COLLEGE

CAREER CHRONOLOGY & ACHIEVEMENTS

Project Manager

Construction of Fire Hydrant Water Pipe – National Guard

Activity and resource planning

Organizing and motivating a project team

Controlling time management

Cost estimating and developing the budget

Ensuring customer satisfaction

Analyzing and managing project risk

Monitoring progress

Managing reports and necessary documentation

TAREQ ALJAAFRAI CONTRACTOR

Project Mechanical Engineer

Construction of East Damamm #2 Substation 115/13.8 KV

Reviewing Specification/Preparation of Shop Drawings

Preparing all required technical Documents

Checking site at various stages of work

Controlling & monitoring the actual execution of all Mechanical Works

Ensuring that project will be done with all approved construction drawings, contract documents, specifications and all applicable standard.

Coordinating with the Consultant and Sub-Contractors.

Checking and preparing program of works and man-power histograms.

Coordinating with all suppliers

Coordinating and representing First party in meeting regarding Mechanical works.

Preparing the daily and weekly progress report

Avoiding any misunderstanding to run Site effectively and seeing the deadline is achieved.

Controlling Project cost and Productivity.

Ad-Hoc responsibilities as directed by Management.

LARSEN & TOUBRO CONSTRUCTION

Project Mechanical Engineer.

Sr. Mechanical Engineer /Interface Manger.

Spearheading the Power Enhancement project from 13.8 kV OHL, SAPRE – Uthmaniyah & Hawiyah; and replacing power supply from Wasit Cogeneration Facility to Abu-Ali Plants (Jubail) 230 KV.

Responsible for the interface management and getting required permit for crossing from Government Agencies (RC, SEC,SRO & MOT,ARAMCO).

Oversees and monitors project wide internal and external interface management activity.

Supporting Construction, Quality, Planning, Safety management by checking the progress of the work as per schedule and completing the project on time.

Providing the failure and repair techniques during root-cause investigations and afford technical expertise to crew personnel on troubleshooting failures, and repairs.

Reviewing and approving service provider NDT (Non-Destructive Testing) procedures as per international standards (ASME section 5, API 1104, ASME 31.3).

Following several construction stage construction method statement, approved & controlled drawings, meet the project time schedules & milestones.

Erection of steel structures, stringing, testing and commissioning for power structures.

Instrumental in updating, evaluating, and creating engineering standards while assessing and ranking Saudi Aramco top inspection challenges.

Credited with awards and commendations from the management.

ASACCO COMPANY

Field Inspector

Handled the project of operating and maintenance of JTI complex while spearheaded the inspection of the pipe, heat exchanger, etc

Reviewing Specification/Preparation of Shop Drawings Performed accurate physical and visual inspection of product as per inspection plans and specification requirements while document as well as report the inspection findings and results

Ensured that project related details such as welding procedures etc., during repairs were provided while evaluated Condition-Based Monitoring (CBM) activities and determined the appropriate action

Ensured that all products have been tested and fall within standards, measured to specifications and within tolerances, readability of labels, etc; conducted various tests and quality checks on finished products

Participated in the development of the maintenance budget to support the reliability strategy and provided maintenance specific subject-matter expertise related to machinery and mechanical equipment when requested

ured the adherence to safety standards in all functional areas and implemented measures for enhancing the safety levels

Responsible for the performance and productivity, customer service, labor stability, and on-time scheduling

Jubail Technical Institute Project Summary

Project Description

The scope of this project is to plan & perform maintenance and operation services for the Royal Commission Jubail Technical Institute. The primary deliverables are operation & maintenance services like electrical, electro mechanical and civil services. Besides, Asacco would also be providing Admin and Warehouse services to the client, JTI. The duration of this Project is 5 years, and the budget is SAR 20 million, which is broken down in approximately SAR 4 million every for 5 years.

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Project Management - JTI

The scope of this project is to plan & perform maintenance Asacco would be managing the entire 5 years project using the standard principles of Project Management. The activities of the project are divided into 5 project management process groups and 10 knowledge areas. Following standard project management principles would give following benefits:
Streamline the entire project activities
Deliver right services at the right time
Resolve problem and issues effectively
Optimize the use of organization resources
Manage changes in a better manner
Respond to risks in a timely manner

Process Groups

Asacco would be dividing the project activities into below mentioned 5 process groups, with each groups has its own purpose.

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Knowledge Areas

Asacco would be decomposing the project work into below mentioned 9 knowledge areas. The entire project work and the activities would be categorized in these knowledge areas.

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Risk Management

Various risks have been identifies and their potential responses have been planned as a part of Risk Management. Some of the major risks are highlighted below:

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Resource Breakdown Structure

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Work Breakdown Structure

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Cost Management Plan

Following is the Cost break-up for the first year. Similarly, cost is calculated for the remaining 4 years and the total cost estimated for this project is SAR 20 million.

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PMIS

  • One of the software which would be most suitable for our Project Management needs would be Harvest. It has various benefits:


  • Monitor Time & Expenses


  • Track team’s productivity & billable hours


  • Manage Projects & Budgets


  • Create & Send invoices

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Brochure for Remote Control Inspection Device (GRADUCATION PROJECT REPORT PMU)

Abstract

A remote control device that investigates nuclear contaminated area. It detects for radioactivity, take pictures of the damages and collects samples from the environment.

Introduction

After the nuclear incident in Fukushima and the earthquake and the tsunami, the nuclear industry has issued a Request for proposal for a small remotelycontrolled inspection vehicle for the purpose of detecting radioactivity in a certain area and investigate the damage

Requirements of the device

According to the tasks expected from the device, it should be able to easily maneuver around obstacles and be able to carry objects from and to the area of the accident.

Device

The vehicle consists of two separate mechanism combined together

Car

The car is built entirely from Tetrix which is materials with different shapes and sizes made out of high grade aluminum alloy

Arm

The second mechanism is a mechanical arm that we have designed and manufactured in "".
The arm is built to fold on itself and lay inside the car, while the car is running; and only activate, when it is needed.

Done By

Yahya Almarqabi
Hussam Alramadan
Ahmad Alyousif
Supervised By:
Dr. Nader Nader

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Subcontractor Selection and Management

ABSTRACT & AIM

  • Increased project complexity and the highly competitive nature of the construction industry means that a construction project is often executed by primary contractor with the help of different subcontractors. However, effectively selecting the numerous subcontractors involved in a construction project becomes a crucial challenge for the main contractor for ensuring timely project completion with acceptable quality. In this report we will propose a framework for subcontractor selection based on a two layer AHP process. The global list of parameters comprises of five global parameters namely environment health and safety (EHS), Quality, Planning, Executions, and finance. Where finance reflects the offers of the qualified subcontractors. Most of the work in the literature looks into the financial aspect as a second phase decision where selection is carried out based on technical matters first, then the contract is awarded to the lowest bidder second. This approach overemphasizes the financial aspect over the technical issues and in so many scenarios this is not the case. Therefore, we propose a framework that integrates the financial matters into the technical matters and selection is carried out based on the overall performance.


  • The criteria (global or sub criteria) for selection is based on experts feedback. A survey is made to prioritize over which criteria the focus has to set. The weights for the AHP process are also assessed through the help of the firm's experts. Subcontractors are evaluated over each one of the sub criteria by a committee formed for bids evaluation. For the frame work application a case study is outlined

Why the need for subcontractors

  • Organizations don't have the required skill in-house


  • Outer suppliers can complete work at a lower cost & subcontractor with lowest offer fraught with several problems


  • The problem starts selecting lower offer with lack of skills in subcontractor

  • lack of safety act


  • replacing workforce after issuing access and progress.

  • The subcontractor should not only be cost effective but should also take sufficient prevention from these malpractices.

Present Study

  • The present study attempts carry out a Sub-contractor selection framework by looking at all technical and financial matters in an integrated manner utilizing the AHP process. To validate the framework, a case study of three

  • subcontractors is presented.


  • List of Global Parameters under consideration for subcontractor comparison:


  • 1.Environment health and Safety (EHS)


  • 2.Quality


  • 3.Planning


  • 4.Execution


  • 5.Finance

Moving beyond lowest bidder approach

  • Financial considerations cannot be the main rule for awarding contracts, technical(Quality, Environment Health and Safety (EHS), Planning, and Execution) considerations are also taken into account for subcontractor selection


  • Importance of Subcontractors:


  • A) Firms lack required inhouse capabilities


  • B) For cost optimization


  • C) To leverage specialized expertise available in the market

Subcontractor Selection Process:

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The Analytical Hierarchy Process (AHP)

  • The analytic hierarchy process (AHP) was developed by Thomas L. Saaty.


  • The Analytic Hierarchy The AHP is designed to solve complex problems involving multiple criteria.


  • An advantage of the AHP is that it is designed to handle situations in which the subjective judgments of individuals constitution important part of the decision process.


Moving beyond lowest bidder approach

  • Financial considerations cannot be the main rule for awarding contracts, technical(Quality, Environment Health and Safety (EHS), Planning, and Execution) considerations are also taken into account for subcontractor selection


  • Importance of Subcontractors:


  • A) Firms lack required inhouse capabilities


  • B) For cost optimization


  • C) To leverage specialized expertise available in the market

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The Analytical Hierarchy Process (AHP)

  • Steps of AHP Analysis


  • 1. Establishment of the Hierarchical Structure


  • 2. Weight between different alternatives:


  • A. Establishment of Pair-wise Comparison


  • B. Calculation of Priority Vector


  • C. Calculation of the Maximum Eigenvalue λmax:


  • D. Examination of Consistency:

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Project

  • Purpose : Select Best Subcontractors


  • Global Parameter :


  • EHS


  • Quality


  • Planning


  • Executions


  • Financial


  • Bidders :


  • Sub1 : Olayan Descon


  • Sub2 : Amkinah


  • Sub3 : KASS Intl. Co


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RESEARCH METHODOLOGY AND DATA COLLECTION

AHP is a strong analytical tool that requires tremendous number of pairwise comparisons, therefore there was a need to make sure that the sub factors that we assessed are truly of high importance


We surveyed the collection of experts or employees and contract managers to clarify the importance of each sub criteria and assigned them value 1-5 based on gathered evidence of relative importance.

RESEARCH METHODOLOGY AND DATA COLLECTION

The weights of all the four global parameters needs to be determined by the contractor for the purpose of aggregation of different global parameters such that the value of:


Kehs+Kquility+kplanning+Kexeution+Kfin=100

However apart from the above four global parameters, it has been felt during the literature review and from initial survey that organizational culture, pre-planning, and present workload & capacity of the sub-contractor should be also included in the global parameters.

Survey: global parameter importance

Analytical Hierarchy process is a strong analytical tool that requires tremendous number of pairwise comparisons. There was a need to make sure that the sub factors that we assessed are truly of high importance. We surveyed the collection of experts or employees and contract managers to clarify the importance of each sub criteria.


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RESEARCH METHODOLOGY AND DATA COLLECTION

The most important aspect of AHP is that it enables decision makers to measure relative importance of sub-contractors rather than exclusive importance. Further, AHP provides stability and flexibility upon changes within a hierarchy or addition of it. Lastly, it has a built-in method to check the inconsistencies of the inputs by the decision makers, if any. AHP is used to determine relative importance between two sub-contractors quantitatively. The values assigned are based on this table:


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Pairwise Comparisons

Pairwise comparisons are fundamental building blocks of the AHP. The AHP employs an underlying scale with values from 1 to 9 to rate the relative preferences for two items.


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Procedure for Synthesizing Judgments

  • The following three-step procedure provides a good approximation of the synthesized priorities.


  • Step 1: Sum the values in each column of the pairwise comparison matrix.


  • Step 2: Divide each element in the pairwise matrix by its column total.


  • The resulting matrix is referred to as the normalizedpairwise comparison matrix.


  • Step 3: Compute the average of the elements in each row of the normalized matrix.


  • These averages provide an estimate of the relative priorities of the elements being compared.


  • Example: Sum the values in each column of the pairwise comparison matrix.


Step 0: Prepare pairwise comparison matrix

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Step 1: Sum the values in each column

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Example: Synthesizing Procedure - 2

Step 2: Divide each element of the matrix by its column total.
All columns in the normalized pairwise comparison matrix now have a sum of 1.


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Example: Synthesizing Procedure - 3

  • Step 3: Average the elements in each row.


  • The values in the normalized pairwise comparison matrix have been converted to decimal form.


  • The result is usually represented as the (relative) priority vector.


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Consistency Ratio

  • The AHP provides a measure of the consistency of pairwise comparison judgments by computing a consistency ratio.


  • The ratio is designed in such a way that values of the ratio exceeding 0.10 are indicative of inconsistent judgments.


  • Although the exact mathematical computation of the consistency ratio is beyond the scope of this text, an approximation of the ratio can be obtained.

Procedure: Estimating Consistency Ratio - 1

  • Step 1: Multiply each value in the first column of the pairwise comparison matrix by the relative priority of the first item considered. Same procedures for other items. Sum the values across the rows to obtain a vector of values labeled “weighted sum.”


  • Step 2: Divide the elements of the vector of weighted sums obtained in Step 1 by the corresponding priority value.


  • Step 3: Compute the average of the values computed in step 2. This average is denoted as lmax.

Example: Consistency Checking - 1

  • Step 1: Multiply each value in the first column of the pairwise comparison matrix by the relative priority of the first item considered. Same procedures for other items. Sum the values across the rows to obtain a vector of values labeled “weighted sum.”


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Example: Consistency Checking - 2

  • Step 2: Divide the elements of the vector of weighted sums by the corresponding priority value.


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  • Step 3: Compute the average of the values computed in step 2 (max).


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Example: Consistency Checking - 3

  • Step 4: Compute the consistency index (CI).


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  • Step 5: Compute the consistency ratio (CR).


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  • The degree of consistency exhibited in the pairwise comparison matrix for comfort is acceptable.

Procedure: Estimating Consistency Ratio - 2

  • Step 4: Compute the consistency index (CI):


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  • Where n is the number of items being compared


  • Step 5: Compute the consistency ratio (CR):


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  • Where RI is the random index, which is the consistency index of a randomly generated pairwise comparison matrix. It can be shown that RI depends on the number of elements being compared and takes on the following values.

Following is initial table for the pairwise comparison by our experts for the five global factors:

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We will illustrate the weights calculation for the 5*5 matrix shown in table3.2 and he rest will follow in the same order. The first step is to calculate the column totals for table 3.2


  • We normalize the data entry in the matrix by dividing each entry over its respective column total. The weights for each criteria is obtained by taking the average raw readings in the table above


Calculations:-

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0.20 *1+ 0.33* 0.33 + 0.12 * 4 + 0.31* 0.5 + 0.04 *5 + 1.15

  • Next step the consistency vector has to be determined and this is done bydividing the raw entries in the consistency vector by the weight evaluations



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  • The value for lambda is simply the average value of the consistency vector. The formula for CI is The results of the calculations are as follows:


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Computing Consistency Ratio (CR):

  • Computing Consistency Ratio (CR): The consistency ratio (CR) is equal to the consistency index divided by the random index (RI)


  • The random index is a direct function of the number of alternatives or systems being considered. For n=5, RI=1.12 hence the consistency ratio is 0.04.


  • It tells us how consistence the assessment of our experts is. A higher number means we are less consistent, whereas a lower number indicates that we are relatively more consistence. (in general, CI should be < 0.1)

In a similar fashion the pair wise comparisons for the sub factors under each global factor:

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Analysis

The weight each factor have is:


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  • Also by comparing the five factors, we determine that Quality is the most important. Quality is very to extremely strongly preferred over Planning (number 7). Quality is moderately preferred over EHS (number 2). In comparing EHS to planning, we decide that EHS is more important.


  • Execution is moderately preferred to Planning (number 4). With these values, we can construct the pairwise comparison matrix and then compute the weights for EHS, quality, planning, execution and finance.


Subcontractor selection

The offer presented by each one is shown:-

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The weight each factor have is:


A total of 12 pair wise comparisons were established after review by a selection committee as shown in matrices-


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Quality /SubCrateris

The weight each factor have is:


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Quality Sub factor Pairwise Comparison

Financial equation development

Establishing the weights of the financial part (lowest bidder weight) involves using the bidder price offers for each sub-contractor and reflecting it into a weight using a mathematical relation. The following will show how the mathematical relation is established. Assume that we have n sub- contractors with are the prices bids offered by each subcontractor. To reflect the lowest price bidder we will set the weight to be . therefore each sub-contractor weight has to be divided by n-1. We have to normalize the resulting weights to make sure that their addition is equal to one, Hence, the subcontractor weights according to their bidding prices is given as


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Subcontractor selection:

The assessments above were validated through carrying out the consistency ratio calculations.
The consistency ratio was found to be less than 0.1 for each matrix stated above.


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The overall weight for each subcontractor can be achieved by suitable multiplication and addition of the sub weights each sub-contractor had according to the above table.


  • The overall weights for each subcontractor is


  • Weight of Sub-Contractor 1: 0.396


  • Weight of Sub-Contractor 2: 0.362


  • Weight of Sub-Contractor 3: 0.247

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Calculation:

Let us see for one parameter for Subcontractor 3:


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Wt (EHS)3 = 0.23* {(0.63*0.1) + (0.26*0.41) + (0.11*0.29)} I.e. By multiplying each column value for subfactor weights with Weight of respective sub-contractor and then multiplying by Global Factor Weight.


For each Subcontractor:-


Overall Wt= Wt (EHS + Quality + Planning + Execution + Financial)

Result

Sub-contractor 1 has the highest overall weight and it has to be selected to perform the job


as it has highest weight over multiple parameters of financial and technical considerations

Summary

Getting a construction project completed requires one to select subcontractors’ for various stages and tasks. It has been a topic of discussion for decades that which criteria should be given the most importance in decision making.
The goal of the study was to develop a set of consistent and broadly acceptable criteria and to integrate the financial aspect into the main technical criteria of interest. Hence the developed AHP tool helps to determine which sub-contractor shall be selected based on parameters- EHS, Quality, planning, execution and finance; instead of solely on subjective assessment and finance alone. The AHP approach provides a more rigorous assessment for subcontractors and integrated the financial aspect also into the main decision framework.
While in most of the literature was towards selecting subcontractor based on two phases; technical and then the bid goes to the lowest offer.
This undermines the technical part and overemphasizes the financial part. Hence our approach is more towards integrating the technical and the financial assessment to be carried out in one framework.
Each main criteria has its own weight to be set according to the preference of the upper management. This will set the financial aspect in a manner that is comparable to the main global criteria of interest.The result of AHP showed that execution comes out as single most important criteria with finance, EHS, quality and planning following it, in that order. This may be because execution has effects on all other parameters. A poorly executed project can escalate financial costs and can compromise on quality. Overall the study was able to take into account qualitative and quantitative factors to determine which sub-contractor should be selected without any bias. Using the data obtained by the survey, we have developed and integrated other selection criteria based on technical evolutions by AHP tool then Fin evaluations. It allows us to make decisions based on multiple criteria. And finally, the best bidder is selected.

Remote Control Inspection Device (GRADUCATION PROJECT REPORT PMU)

Abstract:

Due to the tragedy that happened in Fukushima's nuclear facility after the earthquake and tsunami in 2011, the nuclear industry has issued a Request for Proposal to design and build s small remotely-controlled inspection vehicle. The purpose of the vehicle is to determine the level of radioactivity at specific locations and inspect for damages. The benefit of the vehicle is that it protects the human operator from being exposed to high level of radioactivity. It can also inform the plant operator in case of possible accidents so that they can be averted. [1]

Acknowledgements:

We would like to thank Engr. Mohammad Alakkis for helping us to find the right materials for our project design; and for his assistance with our design.
We would also like to thank Mr. Mohammed Alsenwar and "Saudi Talents" for their assistance.

Introduction:

  • A robot design requires the applying of three different fields.


  • Mechanical: this is the first field that should be applied in robotics design. The design should look into the design of the mechanism in the robot along with the consideration of stresses acting on all the different parts of the robot. Then, select the right material for device.


  • Electrical: It is responsible for carrying the signal from the sensors to the controller. Then to send the response command from the controller to the motors react to the environment. All this wiring, along with carrying the power from the battery to each of the other robot components, makes electrical engineering an important field in robotics design.


  • Software: After the hardware is finished, software is needed to set the behavior of the machine.
    Device Requirements:


  • According to the Guidelines, the vehicle is required to navigate around obstacles, take pictures of the surroundings and carry objects from and to the environment.


Design Procedure

  • We have divided our device's building plan into two parts: car and a mechanical arm.


  • 1) Car:


  • the car is entirely made out of the TETRIX robotic, which is a design system consists of multiple parts with different shapes and dimension that are made from heavy-duty aircraft-grade aluminum (Fig. 1).


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  • Using these parts we have created our car. The car was built in a similar fashion to the starters' guide (Appendix. 2) that was given with the package with some minor modification to allow for a rotating base for the mechanical arm (Fig. 2).


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2) Mechanical Arm:

  • The mechanical arm was made out of 6061 aluminum alloy. One of the main considerations of the arm design is that it should fit with car that is made from TETRIX parts. The TETRIX package comes with three different kinds of screws. However, they all have the same cross section and thread, which allows them to go through the same kind of hole and nut (Fig. 3). Therefore, we were careful to consider the design for assembly of the mechanical arm into the car.


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  • Figure. 3: the three types of screws and the nut.


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  • Figure. 4: the picture on the right is for one of the TETRIX components, while the Picture on the lift is for a part we have designed.


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  • Figure. 5: Mechanical Arm assembly drawing without the gripper


  • The mechanical arm consists of two links with a length of 18cm stretched from the base to the upper joint. The link on the right contains a shelf lay is supporting the motor that is running Link two. A small gear with 40T is fixed on top of the motor which is in a mesh with an 80T gear that is fixed on the shaft (Fig. 6).


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  • Figure. 6: Link 1 of the mechanical arm. The top view shows the shelf that is carrying the motor


  • Link 2 which has a length of 15cm; and it supports the gripper at its end. (Fig. 7).We have used a gripper from a different robot and attached it to the mechanical arm, thus there is no SolidWorks drawing for it. However, we have assumed that the gripper and the object being lifted have a total weight of 70g. We have created a sphere with 70g and placed at a distance from the end of link 2 that equates the length of the gripper.


  • We have only calculated for the maximum weight exerted on the mechanical arm, which is when the arm is parallel to the ground level. The weakest point in the am is at 11 its lower joint. We used SolidWorks Mass Property Function to calculate the weight and the center mass for the mechanical arm (Fig. 7). The values came out to be:


  • Mass = 415.03grams


  • Distance along the x-axis = 24.3cm


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  • Figure. 7: The SolidWroks mass and center of gravity calculations. The program makes itfaster to find these values once the assembly s complete


Electrical

  • One of the greatest benefits of using TETRIX robotics is that it come with motor controllers and an NXT brain. These components makes unnecessary to worry about electrical issues (Fig. 8).


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  • Figure. 8: Sample for wiring TETRIC robotics. Our wiring followed the same procedure.


Software

  • We have used program called ROBOTC to program our robot. The program is written in the C language. It has a built in functions that helps beginners to learn about programming. On the other hand, it can run more sophisticated programs according to it user. Programming is necessary to show the designer how accurate the design is


  • We have run our robot through a program sample called "TETRIX joystick optimize". We made a program for the motors one by one and ran them to figure out any errors we have. (Appendix. 1

    )

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  • Figure. 9: Final Design of the vehicle

Technical Obstacles

  • According to the results the mechanical arm will be heavy on the servo motors, when it is stretched out to its maximum length. Thus it will need to be investigated further until we are able to make a better design.


  • We do not have information on the type of ground the vehicle will be operating on. As a result we cannot be precise on the speed of the vehicle. However, it can be estimated to be around 3km/h


  • All the servo motors we have, except for one, have a limited rotation degree. They can only rotate up to 180 degrees. The manufacturers, though, claim that the motors can be adjusted of have full rotation. We are going to contact them to ask for the adjustment.


  • Lack of experience: none of the three people in the group has a previous experience in designing and building a robot.


  • Figure. 4: the picture on the right is for one of the TETRIX components, while the Picture on the lift is for a part we have designed.


  • The main obstacle is logistics. We have ordered the Tetrix package along with the extra motors for the arm at the beginning of Eid Al-Adha holiday, but we did not receive it until the 2nd of December. Therefore we aere pressurized to finish everything within a month.


References:

Appendix 1: Sample Program from Robotc for joystick control.


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Appendix 2: TETRIX Parts and Information:

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