Category
Practical methodology - feasibility scoping, validation, scaling - from people who have done it.
A feasibility study costs less than the analyzer and reduces project risk by an order of magnitude. The shape of a useful one - what to measure, on what samples, against what reference, with what success criteria.
ICH Q14 sets the framework. ASTM E1655 sets the practice. The intersection - what an inspector actually wants to see in a chemometric validation file - is a short, specific list.
A user requirement specification is the contract between the process owner and everyone else. Done well it shrinks the project; done badly it bloats it. The structure that survives audit and procurement.