The IT system infrastructure must be designed to cope with the demand of the model sophistication and the volume of regular production. Institutions must assess that demand during the planning phase. Institutions should be in a position to demonstrate that the technological constraints have been assessed.
7.4.2
The IT system infrastructure should include, at a minimum, three environments: (i) development, (ii) testing, and (iii) production.
7.4.3
Institutions must have a management plan for systems failure. A system that does not comply with the business requirements must be replaced.
7.4.4
In the case of systems provided by a third party, institutions must have a contingency plan to address the risks that may arise if the third party is no longer available to support the institution.
7.4.5
If a system is designed to produce a given set of metrics, then institutions must use that system for the production and reporting of those metrics. If a system is not fit for purpose despite being implemented, institutions must not use a shadow system or a parallel system to produce the metrics that the original system was meant to produce, while maintaining the deficient original system. Instead, institutions must decommission any deficient system and fully replace it by a functioning system.