Contrary to the common perception regarding software products, Derin Bilgi does not pursue a policy of re-marketing different versions by releasing them.DerinSİS ERP product, which has high customizability.always improves and keeps up to date with all its customers.In this respect, the maintenance agreement provides the opportunity to benefit from the development line of our software products for life, not in the sense of receiving support as in package programs. For our customers in similar sectors, no further development is made for processes that have already been developed, tested and whose structure is established.DerinSİS is a single product line, it does not have different versions at the same time, and is designed to suit its customers with its adjustable features.Derin Bilgi's greatest skill is its ability to serve customers of such different sizes and processes with a single source code, and to work with the feeling that each of them is being written specifically for them. They can only provide limited support for rival products with a maintenance agreement, and often force new purchases by saying that they can only provide some innovations in their new versions.Derin Bilgi does not see this as a real support-maintenance approach, but bases it on sustainability as a requirement of a long-term working environment, in line with the nature of ERP products.