Whole systems thinking encourages designers to analyze and consider the way constituent parts of a system relate to one another, instead of merely focusing on the parts themselves.
Since the inception of design-analysis software, there’s been a strong connection between the amount of computing power available and the way users mathematically model — or simulate — product designs
Engineering Toolbox V2 is an online collections of calculations for mechanical design tasks. It has of about 28 modules for sizing and selecting components such as interference fits, helical springs, pressure vessels, and spring-mass systems.