Abstract
Delays by limited supply of resources are common in many construction projects and may cause serious monetary disputes between project participants. Since the dispute resolution may require unnecessary additional time and cost, preventing delays in advance is an important goal in sustainable construction project management. To prevent delays, a feasible plan must be implemented, which reflects limited resources and provides reliable activity information. For this purpose, this study proposes a generalized resource-constrained critical path method (eRCPM). It consists of three steps to identify resource-dependent activity relationships (resource links) based on the result of resource-constrained scheduling (RCS) under multiple resource constraints. Compared to the existing resource-constrained critical path methods, the eRCPM has the advantage of identifying resource links irrespective of the applied RCS technique because it is based on the result rather than the RCS process. Further, this study presents a Microsoft (MS) Excel-based half-automated prototype system that is linked using file export and import functions to both P6 and MS Project software packages. The detailed process of the eRCPM algorithm and the operation process of the prototype system are described using an example schedule. Through a case study, it was demonstrated that eRCPM appropriately identifies the necessary resource links and provides reliable total floats.
Highlights
The critical path method (CPM) is a representative scheduling technique used in construction project management
This study proposes a generalized resourceconstrained critical path method (RCPM) technique that can implement RCPM irrespective of the type of the resource-constrained scheduling (RCS) method applied under multiple resource constraints
If the resource links identified by eRCPM are reflected, as depicted in Figure 12, the critical path becomes continuous from the project start to the end, and the total float values accurately reflect the resource constraints
Summary
The critical path method (CPM) is a representative scheduling technique used in construction project management. This heuristic process is too complicated to apply [24], and has a limitation that it is only valid for one resource type These previous studies identified resource links in the RCS process and implemented a resourceconstrained critical path method (RCPM) by applying a CPM process that considered the identified resource links and the existing technological activity relationships. This study proposes a generalized RCPM (eRCPM) technique that can implement RCPM irrespective of the type of the RCS method applied under multiple resource constraints It presents a half-automated prototype system that is linked using file export and import functions to both P6 and MSP to verify the validity and scalability of the proposed eRCPM. Fpolre,ePxa6mappplel,yPin6gatphpelyseinrgialthmeestehroiadl amnedthModSPanadppMlySiPngapthpelypinagratlhleel pmaertahlloedl mreeqtuhoirde rineqduivirideuinaldaivpipdruoaplriaaptperporporgiaratemps.roFgurratmhesr.mFourreth, tehremreories,athbeurredeisn aofbeuxredceuntinogf eaxdedciutitoinngalapdrdoigtrioanmasl psuroitgarbalme sfosrueitaacbhlemfoertheoadchfomreathnoedwfoRrCaSnetewchRnCiqSuteecthhnaitqiusedtihffaetreisndt iffrfoemrentthferoemxistthinegexoinsteins.g Tohnuess., Tthhius ss,tuthdiys pstruodpyospersoapogseenseraalgizeenderRalCizPeMd R(eCRPCMPM(e)RtChaPtMca) nthbaet acpanplibeed airprpelsipedectiirvreesopfecthtieveapopf ltiehde aRpCpSliteedchRnCiqSuteesc.hniques
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