Information System and Enterprise Systems, assignment help

Identify the key factors that companies should consider when deciding whether to buy or to build their own information systems. Explain your rationale.
Select one (1) type of the four (4) enterprise systems (i.e., supply chain management, customer relationship management, knowledge management systems, and enterprise resource planning), and speculate on the main issues that companies may encounter when implementing the type of enterprise system that you have selected. Next, suggest two or three (2 or 3) general techniques that companies could use in order to mitigate the issues in question.