The sensor-module loading estimate keeps growing, and I'm fine with real costs being added. What bothers me is the presentation fixture: supplier calls it customer scope, our toolroom calls it undefined, and the spreadsheet gives it a neat allowance anyway. How do I show that honestly beside the other proposal?
Label it unpriced customer scope until the fixture task is defined, and keep any internal budget allowance separate from a supplier price. Ask your toolroom what information they need to estimate it, including the actual box presentation and changeover. A tidy placeholder is still a guess.