Put the decision into the scope
A supply-and-installation proposal should connect a product schedule with an installation scope. Name who orders, checks deliveries, stores components and handles a damaged or incorrect item. Distinguish product warranty terms from responsibility for installation work without assuming either is universal.
Before accepting a proposal
Check that the written proposal names the products, defines the demolition boundary and explains the connection to retained work. Identify any allowance or unresolved selection, and ask who coordinates the relevant trades. Agree how concealed conditions will be documented and how changes require authorization. A broad installation label leaves too much room for different assumptions about what the finished project includes.
Why list model numbers in the proposal?
They establish what is actually being supplied and let you compare alternatives. A broad label such as shower package may hide differences in enclosure, valve trim or wall components that change both scope and outcome.
The owner should confirm the proposed service scope and provider availability independently. This guidance does not identify an approved contractor, establish coverage for a specific property or guarantee acceptance of the project.