Waterfall methodology: For several decades the development teams have used waterfall process [4] for implementing software. But in the recent years several software companies, technical articles and research papers have acknowledged the benefits of agile methodologies over waterfall and have attempted to adopt agile processes. Software industry is constantly trying to keep up with competition t...

Traditional Project Management Methodologies (TPMM) aim to prevent change by extensively planning and documenting as much as possible before the system is developed while change is inevitable and that it is not to be avoided. Additionally, Traditional Project Management rely more on processes, sequential software development, like waterfall. Consequently, there is a demand for system developmen...

Projects combining agile methods with CMMI combine adaptability with predictability to better serve large customer needs. The introduction of Scrum at Systematic, a CMMI Level 5 company, doubled productivity and cut defects by 40% compared to waterfall projects in 2006 by focusing on early testing and time to fix builds. Systematic institutionalized Scrum across all projects and used data drive...

Iterative life cycle models have become popular in software engineering, for example in agile development. In contrast, the waterfall model appears to prevail in manufacturing engineering disciplines. This includes aircraft engineering and Boeing’s project for developing its most recent passenger aircraft, the 777. The paper walks through the phases of the 777’s development and compares to iter...

background: despite their simplicity and the low-cost, the conventional non-contact uv systems have low efficiency in water disinfection. the purpose of this study was to examine the possibility of upgrading these systems by some modifications in order to maximize the water contact with the uv radiation and as a result a better disinfection.    methods: in this study, two enhanced models of non...