In addition to visually evaluating color without controlled lighting, there are several other areas in the workflow where color can go wrong. Are you taking these into consideration in your color workflow?
Receiving incoming materials
Even raw materials from your most trusted suppliers can occasionally be out of specification. Use a color measurement instrument to verify that materials are in color spec.
Avoid costly batch-to-batch variation during production by measuring test panels in pre-production as well as measuring quality frequently during production. Of course, post-production color measurement is also critically important.
Using a consistent tool set across the workflow, from receiving to the lab, pre-production and post-production, goes a long way toward reducing human error. A device with a job function takes it a step further by giving operators visual guidance on when and how to measure color.