For most companies, there are in-house people there who are trained on the vendor specific platform, and understand (at least at a high-level) how it works. Whe

For most companies, there are in-house people there who are trained on the vendor specific platform, and understand (at least at a high-level) how it works. When they want to make big changes, they start talking to their partners/outsourcing companies about it, so that they, themselves, won't have to hire more people just for this one project. (afterwards, what will they be doing?)