Start with one shared brief.
Give bidders the same area list, window, task expectations and supply allocation. Keep assumptions and exceptions visible.
Ask how delivery will be managed.
Discuss supervision, absence cover, inspection and corrections. Ask for relevant evidence rather than assuming a polished website establishes capability.
Continue with Quality & missed work.
Check the commercial details.
Compare pricing format, periodic work, consumables, scope changes and contract terms. Review obligations before committing; this guide is not a contract review.
Continue with Switch providers.
Keep a comparison record.
Use the same headings: scope, visits, supplies, access, reporting, exceptions and terms. An unanswered item is not automatically included.