Hi... For your proposal assessment project - maybe my 25+ years as a psychologist and as a management consultant - writing and assessing hundreds of business proposals, business plans, marketing plans, risk analyses - and managers and staff - is a good start... EXPECT EXCELLENCE
I suggest that we start by reviewing or producing an assessment checklist which identifies the key assessment criteria. I expect you already have this - so maybe it is a review process.
This may already include both quantitative and qualitative data analysis so that you can rate each proposal against the criteria, place them in a rank order if that is important, and provide objective and subjective feedback for each proposal.
As an Australian/International management consultant with 25+ years' experience, my business clients are in various countries - including Britain, USA, Canada, Ireland, Australia, The Philippines, Malaysia, China, Singapore, Tibet, Japan, Panama and Indonesia...
Clients span most industries including for retail - e-commerce (on-line + stores), Website/App developers, Commercial/industrial fencing, aged care, hospitality, resorts, manufacturing, agriculture, aquaculture, funeral services, cryptocurrency, consulting, marina/yachting, education, construction, health & security sectors + +
With all projects I do the work myself. No subcontracting!!
Maybe check out the business plan and proposal examples in my Portfolio... each is different!!