March 2014 from computer economics – “…Our study, ERP Support Staffing Ratios, shows the typical range of ERP support staffing ratios for installations of all sizes. At the median, there are 58 users per ERP support staff member, rising to 131 users per ERP staff member at the 75th percentile. At the 25th percentile, each ERP staff member supports just 29 users…”
180 View – A key question in the selection process should be the effort required to internally support the system. It is really hard to get this information from the vendors and references should be asked this question.