METODE PENJADWALAN M-PERT SEBAGAI ALTERNATIF SOLUSI AKURASI ESTIMASI WAKTU PROYEK (REVIEW)

Abstract

Delay in project completion is the most common problem in the construction industry worldwide. Many things cause this to happen, mainly because of lack of accurate scheduling planning. One of the most common and widely used methods is PERT. However, conventional PERT method ignores the calculation of path duration other than the critical path. This causes a bias in calculating the total project time. This paper intends to introduce the M-PERT scheduling method developed by Pablo Ballesteros-Perez, where this method is a development of conventional PERT method which combines all existing pathways into one combined path. This M-PERT method is enough to use manual calculations without using computer-based simulations or certain software. Several case examples are used to facilitate better understanding of this M-PERT method. The accuracy of the M-PERT method has also improved.  This can be seen with a case study example comparing the PERT and M-PERT methods.  As a reference value, the Standard Normal Distribution is used. From the results of the M-PERT method calculations for the case study example, the average total duration (mean) of the project  and the standard deviation of the project were obtained .  Meanwhile, using the PERT method, we obtained   and . From the calculations using MS-Excel software, it was found that the project duration in the case study example using the conventional PERT method had an error of about 14%, while using the M-PERT method, the error was about 2%.