Limitations of using Reliability, Availability & Maintainability software applications for engineering asset management

Does anyone have experience in using RAMs software applications?

I am working on a paper that looks at the limitations of managing risk and improving reliability of engineering assets by using RAMs software applications but I have no experience in using any RAMs software application.

Software applications are good for storing data and interpreting that data based on a predefined set of rules. However, recommendations made by such an application will only be as be based solely on the data available to the application.

Has anyone experienced situations where predictions made by RAM analysis have been incorrect because incorrect information was used during the RAM analysis?