Before scaling your manufacturing production, it's imperative to understand if your assembly processes are "In Control". Using histograms and specification limits, one can easily generate visual graphs to quickly identify potential issues with manufacturing processes. Learn the basics on where to begin.
The Agile development principles where designed for software development, and really improved the way teams develop and deliver software products more efficiently. Meanwhile, the hardware development industry lagged behind on some of these efficiency improvements. A large contribution to this lag is the inherent costs and manual labor associated with hardware testing (firmware, mechanical and electrical).
Hardware product development has two unique types of testing – each with their own distinct purpose. Much like software development, hardware requires tests to validate features work as specified, during the development phases. But only hardware products require testing of each individual manufactured unit during the production phases.