تجزيه و تحليل روش‌هاي آناليز تاخير مبتني بر پنجره‌ها در برنامه‌ي Easy Plan و ارايه‌ي چهارچوب انتخاب مناسب‌ترين روش آناليز تاخير

Analysing Windows-based Delay Analysis Methods in the Easy Plan Program and Offering a Framework in Selecting the Best Delay Analysis Method

يكي از مهم‌ترين مشكلات در پروژه‌هاي ساخت، بروز تاخير در اجرا و بهره‌برداري پروژه است، كه اغلب باعث ايجاد ادعاهايي ميان كارفرما و پيمانكار مي‌شود. اين موضوع براي عوامل درگير در پروژه، پديده‌يي حايز اهميت است. وجود روش‌هاي مختلف آناليز تاخير، اين اهميت را دو چندان كرده و اين موضوع جدال‌برانگيز شده است. در اين پژوهش، ابتدا به معرفي و مقايسه‌ي كلي روش‌هاي موجود آناليز تاخير در پروژه‌ها پرداخته شده است، و سپس روش‌هاي مبتني بر پنجره‌ها، كه نسبت به ساير روش‌ها به عنوان روش‌هاي با دقت بيشتر شناسايي شده‌اند، با بررسي نمونه‌ي موردي در برنامه‌ي Easy Plan، نتايج حاصل از هر روش تجزيه و تحليل و با هم مقايسه شده‌اند. روش‌هاي مبتني بر پنجره‌ها تا حدودي مشابه‌اند، ولي تفاوت‌هايي نيز دارند و نتايج حاصل از آناليز آنها گاهاً متفاوت است. نتايج حاصل ازاين پژوهش، محدوديت‌هاي هر يك از روش‌هاي مذكور را نشان مي‌دهد و به تحليل‌گر در انتخاب روش آناليز كمك مي‌كند.

Delays in the execution and operation of construction projects are of serious concern. In general, delay is described as any kind of extra time taken beyond previous mutual agreement. This is influenced by a number of internal or external project parameters and often leads to problems and claims between owners, contractors and all parties involved. This issue is even more important in developing countries and is a crucial phenomenon for all involved parties of a contract. The importance of this issue has been compounded by the existence of different delay analysis methods and has made this issue a very challenging controversial area. Mostly, project managers and time scheduling analysts are faced with the problems of delay analysis and solving its induced claims. Furthermore, the system of delay analysis and evaluation is not included in most construction projects and, therefore, both contractor and owner may have differing views on delay analysis and its corresponding responsibilities. Thus, estimation of delay effects and determination of each party’s responsibilities are critical. Hence, project managers and analysts must have an effective and efficient systematic approach for analyzing delays and determining responsibilities. In this paper, first, a general comparison on the current available methods for analyzing delays in construction projects is introduced. Then, a windows-based delay analysis, identified as a more accurate method than other effective methods, is presented. The results of each method are discussed and compared through a case study run by the Easy Plan program. Windows-based methods are somewhat similar to each other but still have some differences. Sometimes, their analysis results are different. The results of the present study demonstrate the limitations of each of these analysis methods and helps analysts in their proper selection. In fact, considering project conditions, analysts are assisted through defining and providing some effective rules.