Kaizen assumes that every aspect of your life deserves to be constantly improved, and anyone can take a Kaizen approach in both their personal and professional lives to make almost daily incremental improvements that will benefit them long-term.
No matter what the industry or organization, they all operate with at least one constraint that limits the throughput of the entire organization. With this constraint, working to improve the process in areas other than the constraint will not be as effective in improving the overall process as focusing efforts on the constraint.
Mistake proofing devices are typically simple and inexpensive, but the benefits of the mistake proofing can be invaluable to the organization, process, process owner, and to the end user.
In the context of process improvement, standardization is necessary to consistently deliver high quality process output and sustain the gains made through process improvement efforts.