Start with what the item has to achieve
Before a substitution is priced, record what the item is doing: how it is touched, how it is cleaned, how it is seen and how long it must last. A change that respects those constraints usually survives.
Where cost comes out safely
Concealed construction, carcass materials, unseen hardware, over specified thicknesses and unnecessarily complex profiles are usually safe places to save money.
- Carcass and concealed materials
- Simplified profiles that read the same at distance
- Standardised sizes across room types
- Rationalised finish counts
Where it reliably goes wrong
Downgrading the touched surface, the visible finish, the moving hardware or the fabric grade is where a saving turns into a replacement programme two years later.
Record the decision
Every accepted substitution should be written back into the specification, or the factory inspection has nothing correct to check against and the designer is blamed for the result.