Generally speaking, custom ERP solutions have an even lower adoption and utilization rate than standardized ERP systems. Why? Because you probably did not write a comprehensive “how to” on your homegrown ERP system and it may be clunky and difficult to use and learn. If the system is difficult to use then your employees will either not use it at all or use it infrequently and inefficiently.
Your homegrown solution was built to solve a problem and it may not be based on the best process flow or on user experience. But those two factors are huge for adoption and learning!
The employees who have been there since the beginning of the system have probably gotten to be pretty good at it- but what about your new employees who have to learn the system? What about the younger generation who have grown up with intuitive software? if you are hoping to hire top notch employees, how will your company and your clunky homegrown software beat out other companies looking to hire who run top of the line software that allows them to do their jobs better and with fewer headaches?
Standardized ERP systems will come with manuals, learning systems, training videos, web casts, and much more to help your employees and future employees understand the system which can maximize adoption and utilization of the software.