Applied Research on Civil Engineering and Environment (ARCEE) VOL. 02 NO. 01, August 2020 LAST PLANNER SYSTEM (LPS) IMPLEMENTATION ON JAKARTA-CIKAMPEK II ELEVATED TOLL ROAD PROJECT Ni’mah Tozahro1, Afrizal Nursin2 1,2Politeknik Negeri Jakarta , Jurusan Teknik Sipil, Jl. Prof. Dr. G.A Siwabessy, Kampus Baru UI, Beji, Kukusan, Beji, Kota Depok, Tlp.+6221 7270036, Fax (021) 7270034, 16425. e-mail : [email protected] ABSTRACT In construction industry, its implementation of the construction has its own constraints. A good management or project management system is needed to minimize the risk of these constraints. The latest project management concept that has proven more effective and efficient is Last Planner System method. This study aims to investigate how the implementation of Last Planner System works on Jakarta- Cikampek II Elevated Toll Road Project. With the evaluation of weekly job evaluations using PPC (Percent Plan Completed) and Pareto Variance Constraint analysis, the constraint issues of this project will be identified. Then they are followed up to find the right solution in handling the constraints. The research method is done by conducting literature study, problem formulation, followed by implementing LPS method, which is through work flow control such as phase and pull plan, lookahead plan, constrain analysis, daily huddles, PPC (Percent Plan Completed) calculation, Pareto Chart analysis with data variation of issues that have been obtained. The results show that the average PPC weekly project is 83.04% and the most influential reason that must be concerned its priority is submittals. Keywords : Constrains; Last Planner System; Percent Plan Completed; Pareto Chart INTRODUCTION or system that is implemented on the project. The latest project management Research Background concept and has proven more effective and efficient is Last Planner System method. Every implementation of the construction industry has its own constraints. It causes Therefore, this research attempts to unmatching to the plan that has already implement the Last Planner System (LPS) been made on working contract document. concept to study the management process The unmatched finishing time of on the Jakarta-Cikampek II Elevated Toll construction work with the working Road Project. contract is called detainment. The objective of this research is to Jakarta-Cikampek II Elevated Toll Road investigate the implementation of Last Project is one of the projects that is Planner System (LPS) concept on Jakarta- detained/overdue (PT Jasa Marga Jalan Cikampek II Elevated Toll Road Project Layang Cikampek, 2019). On the agreed (Nursin, 2019), to evaluate the working plan contract, this project could be performance with Percent Plan Completed operated since March 2019, but because of (PPC), and with Pareto chart analysis to the constraints during the development investigate the proper follow-up for issues progress, this project was finished beyond on Jakarta-Cikampek II Elevated Toll the agreed target. Road Project. The detainment on construction project very depends on the project management 17 Accepted : 18 August 2020 Applied Research on Civil Engineering and Environment (ARCEE) VOL. 02 NO. 01, August 2020 RESEARCH METHOD RESULT AND DISCUSSION Research Location Because the research period was limited, it was only six weeks taken for PPC Jakarta-Cikampek II Elevated Toll Road observation (Ballard, 2000). It started Project length is 36.84 km, located on Cikunir since week 108 to week 113. The week - West Karawang, West Java, Indonesia (PT 113 was the last week before the project Jasa Marga Jalan Layang Cikampek, 2019). was restored for Eid Mubarak 1440 The focus of this research was conducted on Hijriyah. Period of 14 April 2019 until the project in Zone 3, Section 2 (SS, West 25 May 2019. Bekasi - East Bekasi). The scope of works observed were: Research Design 1) Erection Girder 2) Link Slab Literature Field Start Study 3) Parapet Observation (Project) 4) Rigid 5) Access Asphalting Identifiying the 6) Cap-piling Constraint of Jakarta- Cikampek II Elevated Toll Road Project LPS Working System Control 1) Master Schedule Collecting The Master Schedule on Jakarta- Observation Result Cikampek II Elevated Toll Road Data and Literature Study Project is taken from S Curve which is interpreted into a schedule. S Curve is used as the measure for work objectives Implementing Last Planner System (LPS) which have to be completed by the on Jakarta-Cikampek project team each week. II Elevated Toll Road Project 2) Phase and Pull Planning Phase planning and Pull Planning Evaluating interprets main works on the S Curve Performance with into work details to meet the main work PPC requirements. Those works are NOT OK managed accordingly and timely Interview (Arifin, 2017). 3) Lookahead Planning The works resulted from Phase and Pull Result Planning are broken down into the stage of process/ operation, the OK constrain issues are identified, the Conclusion responsibilities are delegated to each person (executor), and the assignments are ready to be done (Hamzeh, Ballard, Finish & Tommelein, 2008). 18 Accepted : 18 August 2020 Applied Research on Civil Engineering and Environment (ARCEE) VOL. 02 NO. 01, August 2020 The constrains identification result on Permissi schedule to the Jakarta-Cikampek II Elevated Toll on Traffic Team Road Project are presented on Table 1. Asphalt Highwa Filing a permit y Patrol and project Permissi schedule to the Table 1. Lookahead Planning Issues Identification on Traffic Team Works Estimat Handling Source: Personal Data ed 4) Weekly Work Plan Cons- trains Commonly known as Weekly Work Erection Sub- Contacting Sub- Plan, it is a work list that optimistically Girder Contract Contractor Once will be done on a week asa result of or A Week regarding project team discussion. In Zone 3, the Overdue schedule project team consisted of a number Link Workers Providing Man- executors will scheduling once a week Slab Mobiliz Lift to have a meeting on making Weekly Reinforci ation Work Plan. ng Without Scaffold 5) Daily Huddles ing It is an activity to check the preparation Ladder of the Project Team to realize Weekly Link Highwa Filing a permit Slab y Patrol and project Work Plan (WWP) and required Casting Permissi schedule to the elements for project to maintain WWP on Traffic Team that has been made by Project Team. Deck Finished Adding Workers Slab Overdue Reinforci Evaluation with Percent Plan ng Completed (PPC) Deck Highwa Filing a permit PPC is achieved by calculating the sum of Slab y Patrol and project works volume that have been done divided Casting Permissi schedule to the on Traffic Team by the sum of planned works volume Parapet Reinforc Supervising on (Robby, Steven, & Andi, 2013). Here is Reinforci ing reinforcing and the Equation (1) presented in PPC ng worker installing matrix calculation. is not accordin PPC (%)= × 100 ...(1) g with Σ 푣표푙푢푚푒 푟푒푎푙푖푠푎푠푖 parapet Σ 푣표푙푢푚푒 푟푒푛푐푎푛푎 elevatio n Parapet Highwa Filing a permit Casting y Patrol and project Permissi schedule to the on Traffic Team Rigid Highwa Filing a permit y Patrol and project Figure 1. Percent Plan Completed Chart Source: Personal Data 19 Accepted : 18 August 2020 Applied Research on Civil Engineering and Environment (ARCEE) VOL. 02 NO. 01, August 2020 PPC Value is calculated based on work There are 5 constraints that are considered item on Weekly Work Plan (Setiaji, 2019). as the causes of unmatch realization toward PPC Value on each week is calculated in Weekly Work Plan on Week 108, 111, and total and average. 113, namely: Presented in Table 2 are the result of PPC 1) Permit calculation recapitulation from Week 108 2) Weather to 113. 3) Working Scope Change 3) Communication Table 2. PPC Value Recapitulation Finished Overdue Week- PPC Value The recapitulation of the constraint 108 78.21% calculation result is presented on Table 3. 109 83.22% 110 82.47% Tabel 3. Constraint Calculation Result 111 81.29% 112 86.91% Constraint Works Cummulative 113 86.15% Percentage Permission 18 36.73% Average 83.04% Source: Personal Data Communication 11 59.18% Weather 11 81.63% After calculating the PPC Value per work Working Scope 5 91.84% item and make it into PPC per week, the Change next evaluation stage of LPS Concept is Finished 4 100.00% make the PPC Value chart. PPC Chart is Overdue presented on figure1. Total 49 The objective is to investigate the PPC Source: Personal Data Value trend with linear line and when the PPC Value is below the linear line trend. Pareto Chart Analysis As shown on Picture 1, the point on Week 108, 111, and 113 are below the PPC linear line trend. Therefore, follow-up is needed along with issues analysis using Pareto chart to investigate the constraint in priority concern. Field observation and interview were done to investigate the cause of unfinished works. There are 49 unfinished works on weeks that have PPC value below PPC Figure 2. Pareto Chart on Constraint Variation trend linear. Source: Personal Data 20 Accepted : 18 August 2020 Applied Research on Civil Engineering and Environment (ARCEE) VOL. 02 NO. 01, August 2020 The calculation result is interpreted into them have the construction project Pareto chart as shown on Figure 2. schedule. Pareto Chart was first time introduced ACKNOWLEDGEMENT by an Italian economist named Vilfredo Pareto (1848-1923). On 1906, he In this opportunity, the author would obser ved that 80% of Italy’s income is like to thank Research and Service possessed by 20% of total population. Center of Politeknik Negeri Jakarta for Pareto Principal is known as 80, -20 the final research project fund given to rules, means that in many occasion, the students that has already made this approximately 80% of the effect has research successfully done. The author 20% causes (Juran, 2008). also acknowledges to all the parties involved in contributing to this Based on the information gained from research.