Purchasing an ILS (Part 4): Develop a Request for Proposal (RFP), submit it to vendors and shortlist

This piece of the process is essential. Through it, you comprehensively outline your needs and by doing so will make comparing systems much easier. If you’re going the open-source route, then this step won’t apply (though outlining your requirements would still be a very useful exercise). 
These sites are useful for general guidance on proposal writing and for [...]