Cấu trúc phân rã công việc (WBS) có 2 thành phần là PCWBS và FWWBS. Người đọc sẽ có những khái niệm và định nghĩa đầy đủ về Cấu trúc phân rã công việc WBS để có thêm kiến thức trong việc tạo lập các ma trận, xây dựng và quản lý tiến độ thi công.
What is WBS (Work Breakdown Structure)? To classify the resources necessary to execute Project in order to properly control Project To systematically define the ALL activities(scopes) of Project To break down all activities with MECE(mutually exclusive collectively exhaustive) concept What is WBS (Work Breakdown Structure)? WBS is the technique of Project control, but not special and not new WBS technique is breaking the work WBS technique is to discrimination and understanding of all activities What is WBS (Purpose of WBS technique)? Effective operation of Project execution/ control Define each Activity for PJ Define all required up stream information Type of WBS in JGC (PLANT Engineering Business) F-WBS（Ｗｈａｔ） (Functional WBS) Definition of Work (Activity) and Cost by Function Universal Coding system within JGC Group PC-WBS（Ｗｈｅｒｅ） (Project Control WBS) Geographical Plant Area Breakdown An unique Coding of each Project to achieve effective and efficient PJ control WBS Technique Discrimination of work WBS :Discrimination of work PCWBS vs FWBS FWBS CODE in JGC JGC’s FWBS Code is specified in JGS JGS= JGC Standard To use JGS, you are requested to read and confirm the SECRECY DECLARATION - SECRECY DECLARATION – (JGS) You agree to the following terms and conditions whenever access and use JGS You shall acknowledge that JGS contain highly confidential information and intellectual properties You shall disclose JGS only to personnel who need to know them to the works instructed and/ or approved by JGC You shall not make any use of JGS for any other purpose than that of execution of the works instructed and/or approved JGC You shall not make any copies or storage JGS What is FWBS CODE in JGC CODE Structure Supplementary Code (2 alphanumeric characters) Sub-code (4 alphanumeric characters) Prime-code (2 alphanumeric characters) FWBS Sample (Level-1) FWBS 10 20 30 40 50 60 70 80 Description Professional Service Material Labor Work Transportation Direct Expense Financial Burden Cost Items for Accounting Purpose Contingency 10 FWBS Sample (Level-2) Description Project Management & Control Basic Engineering Detailed Engineering Procurement Service Quality Control Construction MGT & Supervision Commissioning & Operation 11 FWBS Sample (Level-3) 13X: Detail Engineering 21X: Direct Materials 31X: Direct Labor Work Where X= 1:Civil General 2:Concrete Structure 3:Steel Structure 4:Buildding 5:Equipment 6:Piping 7:Instrumentation 8:Electrical 9:Insulation A: Painting B: Fireproof & Surface Protection C: Catalysts, Chemicals & Utilities 12 PC-WBS Sample Plot Plan Area 30 FURNACE COMPRESSOR Area 31 VESSEL SHELL & TUBE HEAT EXCHANGER Area 32 PIPE RACK Area 20 Common: 00 VESSEL AIR FIN COOLER PUMP VESSEL Area 10 TOWER Area 11 VESSEL SHELL&TUBE HEAT EXCHANGER Area 12 13 How to decide PC-WBS? Control objectives Type of Stake Holders Partner, Subcontractor？ Type of Project Brand New? Revamp? Environment for Work Type of Plant Process Unit? Utility? Scale？ Schedule Timing of Work start or Work together, or separately? Control Service Reporting Level Client Division Project Team Discipline Lead Engineer Control Purpose Time Cost Volume of Work Data Volume 14 How to decide PC-WBS? PC-WBS LEVEL LEVEL LEVEL WORK PACKAGE W.P NO SCOPE OF WORK RESPONSIBILITY F-WBS Work Volume Resource SCHEDULE COST PROGRESS PLAN FORECAST ACTUAL Resource • Time • COST • Man Power • Deliverables • Materials • Construction Equipment WORK PACKAGE : Minimum Unit to control the Schedule and Cost 15 Work Framing Example (P C -W B S ) 10 (F -W B S ) P IL IN G F O U N D A T IO N S T R U C T U R E E R E C T IO N E Q U IP M E N T E R E C T IO N T O W E R E R E C T IO N F U R N A C E E R E C T IO N C O M P R E S S O R E R E C T IO N O T H E R E Q U IP E R E C T IO N P IP IN G S H O P F A B R IC A T IO N F IE L D IN S T A L L A T IO N T E S T & F L U S H IN G IN S T R U M E N T /E L E C T R IC A L F IE L D E R E C T IO N TEST M E C H A N IC A L C O M P L E T IO N 11 * * 311 312 313 315 3151 3156 3158 3159 * 3161 3162 3168 3178 3179 12 * * 00 20 20 * * * 30 31 * * 32 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 316 317 31Z 16 Concept of Numbering(Coding) Cost Account No PC - WBS Schedule Activity No PC - WBS F - WBS F - WBS Suffix WORK PACKAGE NO PC - WBS F - WBS Requisition No Type PC - WBS Engineering Doc No F - WBS Seq.No F - WBS Seq.No Type PC - WBS F - WBS Seq.No R Purchase Order No Type PC - WBS BOM/BOQ Data ID PC - WBS P F - WBS Vendor Document No Type V PC - WBS F - WBS Seq.No Seq.No 17