Can you maintain enough manpower in-house to deal with all such eventualities? If not, how does someone in your organization know which vendor to call when something needs to be fixed?

The answer is a single vendor for all your maintenance requirements, so that when something needs attention, everyone knows where to turn. We provide just such a service. Hurix has a well-defined and mature application maintenance process, which is very effective in capturing maintenance requests and reporting the successful resolution of each such request. Our process ensures that responsibilities are effectively assigned to different teams, depending on the criticality of each request.