In: Computer Science
Large system development means development of system at large scale. large system have millions line of code and hundreds of computer. It needs more budget and time too to develop. Being large makes it difficult to manage, improve, even it is risky to develop. The rate of failure in the large system is development is high. At small system development the security risk is very low but in large system development the risk is more. Programming and operational errors are always big problems. These cause mysterious breakdown. The performance is always the key point which matters in the development of any system, but large system cannot guarantee for the performance.
Almost all the large scale systems are used for instant reaction and so system failure is the worst problem in large system development.
It was difficult to maintain and develop large systems before some decades, but now a days reusability of the code makes it easy to develop.