Effective patch and change management requires adequate resources in terms of personnel, time, and funding. If suitable employees are not available, for example, the required roles could be staffed with unqualified personnel. This can also prevent interfaces for specific information being created—for example, between IT and the corresponding contacts in specialised departments. In addition, it may be impossible to provide the required capacities for the infrastructure of test and distribution environments. While it is often possible to compensate for shortages of personnel, time, and finances during normal operations, these shortages become even more apparent under serious time pressure, such as when emergency patches are being installed.