CASE Tools makes systems which require considerable oversight and all operators and users must be trained in the particulars of the system. The systems are also often difficult to change or customize and thus modifications to their functions can be expensive.
While systems produced with CASE Tools tend to outlast other systems, they are top-heavy in terms of expense and maintenance. They require their own dedicated staff in order to remain operational and meet user needs.
CASE Tools also requires a huge amount of specificity in order to function well. The system must know in advance what its users will need of it in voluminous and laborious terms.