Modularity has been seen as key to the success of OSS projects. However empirical studies on modularity of OSS systems have resulted in confusing results. To account for underlying mechanisms of those confusing results, we systematically examine widely studied OSS projects. Based on our systematic review on technical and organizational structures, we suggest that organizational circumstances of...

The UNICORE Grid-technology provides a seamless, secure and intuitive access to distributed Grid resources. In this paper we present the recent evolution from project results to production Grids. At the beginning UNICORE was developed as a prototype software in two projects funded by the German research ministry (BMBF). Over the following years, in various European-funded projects, UNICORE evol...

“Release early, release often” is becoming a popular new product introduction strategy in open source software development. We study the influence of release strategies on the download market share of open source projects. Using a panel data set collected from Sourceforge.net, we find that while more frequent releases are associated with better subsequent download market share, the relationship...

Simulation studies are well suited for the analysis of earth moving operations for many reasons. First, projects generally involve some form of resource interactions where certain equipment must obtain certain resources before proceeding. Second, task durations are highly empirical and are thus suited for stochastic modeling. And third, projects are affected by external processes such as breakd...

Projects are finite terminating endeavors with distinctive outcomes, usually, occurring under transient conditions. Nevertheless, most estimation, planning, and scheduling approaches overlook the dynamics of project-based systems in construction. These approaches underestimate the influence of process repetitiveness, the variation of learning curves and the conservation of processes’ properties...

This study aimed to economic evaluation of ostrich production in Sistan region by the use fuzzy conception in five platforms including (1 bird, 30 birds, 50 birds, 100 birds and 200 birds). The result showed that amount of benefit cost for 30, 50, 100 and 200 was 0.20, 0.26, 0.30, 0.31 and present value was 105, 549, 1460, 2927 million rials. According to the results obtained from present value...

There are widespread nickel resources around the world, but divided principally between nickel sulfide or laterite (oxide) resources. Historically production has been dominated by sulfide ores but future production is increasing shifting to laterite ores. The principal reason for this historically is that sulfide ores are easier to process, through conventional mining, smelting and refining, co...

The construction industry has been suffering from modest productivity development in recent decades. To address the recognized problems, collaborative delivery methods are replacing traditional project models, especially large and complex projects.The aim of this research is to describe production capability creation (PCC) process as a solution for planning phase. PCC should be implemented para...