For Developers. By Developers.| devopedia.org
The Iron Triangle is essentially a model/framework for project management. The three sides or vertices of the triangle are cost, time and scope. Scope is often substituted in literature with quality. Some see quality as the outcome of the other three.| Devopedia
A good practice in software design is to build software from smaller, single-purpose modules that expose well-defined interfaces. This is also in the spirit of software reuse. With the widespread adoption of open source software, often our own applications or modules depend on those written by others. Thus, to build our software we need to bring in all parts on which it depends, including language libraries and remote third-party modules.| Devopedia
A typical software development process is sequential (1970s-1990s): define requirements, analyse, design, code, test and deploy. In this process, testing happens towards the end. Problems uncovered by testing at such a late stage can cause costly redesign and delays. The idea of Shift Left is to involve testing teams earlier in the process and to think about testing at all stages of the process.| Devopedia