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Labor productivity improvement in construction projects using wbs obs integration.final.13.11.2014

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Labor productivity improvement in construction projects using wbs obs integration.final.13.11.2014

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Labor productivity improvement in construction projects using wbs obs integration.final.13.11.2014

  1. 1. Labor Productivity Improvement inLabor Productivity Improvement in Construction Projects usingConstruction Projects using WBS & OBS integration.WBS & OBS integration. Essam Mohamed Lotfi, PMP, CCP
  2. 2. Bibliography 2 Essam Lotffy is a Construction Manager-MEP at Trojan general contracting in AbuEssam Lotffy is a Construction Manager-MEP at Trojan general contracting in Abu Dhabi, UAE. He received his BSc. degree in Electrical Engineering (Major) and PowerDhabi, UAE. He received his BSc. degree in Electrical Engineering (Major) and Power Distribution (Minor) through Zagazig University, Zagazig, Egypt since 2001.Distribution (Minor) through Zagazig University, Zagazig, Egypt since 2001. Pursued and achieved his certificates in Project Management (PMP®) from PMI-USAPursued and achieved his certificates in Project Management (PMP®) from PMI-USA since 2013, and certificate in Cost Management (CCP®) from AACE International sincesince 2013, and certificate in Cost Management (CCP®) from AACE International since june-2014.june-2014. He does claim 13 years extensive hands on experience in various aspects of projectsHe does claim 13 years extensive hands on experience in various aspects of projects and project management within maintenance, power distribution networks monitoringand project management within maintenance, power distribution networks monitoring and supervision and construction projects as well.and supervision and construction projects as well. During his employment tenure with his past employers Suez Canal Electrical DistributionDuring his employment tenure with his past employers Suez Canal Electrical Distribution Company, United Engineering & Trading Company – ENTRACO, and TROJAN GeneralCompany, United Engineering & Trading Company – ENTRACO, and TROJAN General Contracting, he has successfully managed various projects, in addition enhancing theContracting, he has successfully managed various projects, in addition enhancing the process capabilities and organization performance as well.process capabilities and organization performance as well. Essam Lotffy is actively pursuing potential opportunities in the project management field,Essam Lotffy is actively pursuing potential opportunities in the project management field, where a room of growth and opportunities for advancement exists.where a room of growth and opportunities for advancement exists.
  3. 3. OutlineOutline • Abu Dhabi is one of the cities in GCC where Construction field is booming very fast. • The presentation is intended to show the effects of labor productivity on construction projects’ profits. • The factors which result in productivity loss and how to improve the productivity using WBS & OBS framework. • Illustrate how loss productivity will affect direct labor cost which may results in reducing project profits by using Earned Value management (Accomplished man- hours). • How WBS & OBS integration matrix will recover loss productivity.
  4. 4. IntroductionIntroduction
  5. 5. Thepurposeof thispresentation isto show theeffect of establishingThepurposeof thispresentation isto show theeffect of establishing WBS& OBSintegration matrix to monitor theproject performanceandWBS& OBSintegration matrix to monitor theproject performanceand improvethelabor productivity by assigning worksto appropriateimprovethelabor productivity by assigning worksto appropriate organizational units.organizational units. Thepurposeof thispresentation isto show theeffect of establishingThepurposeof thispresentation isto show theeffect of establishing WBS& OBSintegration matrix to monitor theproject performanceandWBS& OBSintegration matrix to monitor theproject performanceand improvethelabor productivity by assigning worksto appropriateimprovethelabor productivity by assigning worksto appropriate organizational units.organizational units.
  6. 6. Team Member Role Reporting To Responsibilities Project Manager (PM) 1- Lead project Team Organization Management 1- Monitor Cost 2- Monitor Time 3- Achieve Planned cost 4- Achieve Planned Time Construction Manager (CM) 1-Lead Activities Execution Project Manager (PM) 1-Monitor progress 2- Monitor Progress 2-Momitor Subcontractors Performance 3-prepare payments 4-Follow issues with consultant Project Engineer (PE) 1- Lead Drawing approvals Construction Manager (CM) 1- Deliver Drawings & materials 2- Lead material approvals As per project requirements 3- Follow material delivery 2-Issue Materials orders. 4- Distribute activities 3- Follow materials delivery 4- Distribute activities with related Materials & Drawings. 5- Conform Quality. Site Engineer (SE) 1-Leads Supervisors Project Engineer (PE) 1- Distribute supervisors & Technicians 2- Lead Technicians 2- Follow planned Activities. 3- Lead Store 3- Issue materials from stores 4- Achieve progress 5- Perform Quality Supervisors 1- Lead Technicians Site Engineer (SE) 1- Perform Drawings 2- Supervise installation 2- Control Technicians productivity   3- Control Materials installation   4- Achieve Quality
  7. 7. COMMON CAUSES OF LOSS IN PRODUCTIVITYCOMMON CAUSES OF LOSS IN PRODUCTIVITY
  8. 8. COMMON CAUSES OF LOSS IN PRODUCTIVITYCOMMON CAUSES OF LOSS IN PRODUCTIVITY
  9. 9. COMMON CAUSES OF LOSS IN PRODUCTIVITYCOMMON CAUSES OF LOSS IN PRODUCTIVITY
  10. 10. Sequence of ActivitySequence of Activity Installation of Air Duct for Exhaust system at parking area ,NormallyInstallation of Air Duct for Exhaust system at parking area ,Normally follow the following criteriafollow the following criteria
  11. 11. Sequence of ActivitySequence of Activity Installation of Air Duct for Exhaust system at parking areaInstallation of Air Duct for Exhaust system at parking area ,Normally follow the following criteria,Normally follow the following criteria
  12. 12. Sequence of ActivitySequence of Activity Installation of Air Duct for Exhaust system atInstallation of Air Duct for Exhaust system at parking area, there are two criteria can be followedparking area, there are two criteria can be followed
  13. 13. Sequence of ActivitySequence of Activity Comparing Criteria (A) & (B)Comparing Criteria (A) & (B) Manpower used(Nrs.) Duration (Hrs.) Production (Nrs.) IncurredCost(Hrs/Pc) Cost Hrs/Psc Criteria(A) 3 10 3 (10Hrs*3Labors)/3Pcs 10Hrs/Pcs Criteria(B) 2 10 8 (10Hrs*2Labors)/8Pcs 2.5Hrs/Pcs ConclusionConclusion:: Criteria (B) proved to be higherCriteria (B) proved to be higher productivity rates per hour which means less costproductivity rates per hour which means less cost & better timing to complete the same task.& better timing to complete the same task.
  14. 14. Learning CurveLearning Curve It’s a technique achieved by repeating same activity inIt’s a technique achieved by repeating same activity in different zones by a fixed group of technicians, in casedifferent zones by a fixed group of technicians, in case those groups got interrupted before completing samethose groups got interrupted before completing same activity in all zones the productivity of those groups willactivity in all zones the productivity of those groups will be lower when we assign them again to the previousbe lower when we assign them again to the previous activity zone, Look at the following example to find theactivity zone, Look at the following example to find the implications of interrupting learning curve.implications of interrupting learning curve. ExampleExample In residential tower has typical floors, we assigned aIn residential tower has typical floors, we assigned a group of technicians to fix light fitting under supervisiongroup of technicians to fix light fitting under supervision of one supervisor, we noticed the following,of one supervisor, we noticed the following,
  15. 15. Floor 1 st 2 nd 3 rd 4 th 5 th 6 th 7 th Light fitting Ficxed 169 169 169 169 169 169 169 Duratation (Days) 3 3 3 2.5 2.5 2 2 Productivity / Day 56.3 56.3 56.3 67.6 67.6 84.5 84.5
  16. 16. Looking to previous tables which Indicates that fixingLooking to previous tables which Indicates that fixing group of 3 technicians to perform the same activitygroup of 3 technicians to perform the same activity repeatedly will increase their productivity day to day asrepeatedly will increase their productivity day to day as the same group will be more familiar with the type ofthe same group will be more familiar with the type of the light fitting and site conditions hence give morethe light fitting and site conditions hence give more productivity (productivity (See Graph showing learning curveSee Graph showing learning curve improvementimprovement), while interrupting those groups will), while interrupting those groups will disrupt the learning curve of the technicians as indisrupt the learning curve of the technicians as in second building with same specifications we have thesecond building with same specifications we have the same arrangements, but the activity were interruptedsame arrangements, but the activity were interrupted by reassigning the technicians to other activities thenby reassigning the technicians to other activities then returning back to the light fitting installation activity asreturning back to the light fitting installation activity as shown in the following graph.shown in the following graph.
  17. 17. Floor 1 st 2 nd 3 rd 4 th 5 th 6 th 7 th Light fitting Ficxed 169 169 169 169 169 169 169 Duratation (Days) 3 3 0 0 0 3 3 Productivity / Day 56.3 56.3 0.0 0.0 0.0 56.3 56.3
  18. 18. PRODUCTIVITY IMPROVEMENTPRODUCTIVITY IMPROVEMENTPRODUCTIVITY IMPROVEMENTPRODUCTIVITY IMPROVEMENT To monitor manpower performance during constructionTo monitor manpower performance during construction project life cycle we have to use clear framework thatproject life cycle we have to use clear framework that control the process of monitor and this requires all projectcontrol the process of monitor and this requires all project team members to know their roles and responsibilities hereteam members to know their roles and responsibilities here the necessity of Responsibility Assignment matrix arisesthe necessity of Responsibility Assignment matrix arises where you can assign specific resources to specific taskwhere you can assign specific resources to specific task using WBS & OBS integration hence you can control eitherusing WBS & OBS integration hence you can control either productivity and cost as well, the following figure Showingproductivity and cost as well, the following figure Showing the WBS & OBS integration matrix which representing thethe WBS & OBS integration matrix which representing the idea of this technical paper as a proper technique toidea of this technical paper as a proper technique to monitor the work progress and improve the labormonitor the work progress and improve the labor productivity rates.productivity rates.
  19. 19. ConclusionConclusion
  20. 20. THANK YOUTHANK YOU

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