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Improving Production with Lean Thinking by Javier Santos, Richard A. Wysk, Jose M. Torres

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Appendix A:

Problems

INTRODUCTION

Numeric problems are classified in five different categories based on the chapers of this book. Some chapters don't have specific numeric problems, but some concepts can appear in the problems of other chapters.

Some problems may seem to be the same, but it is important to read the data carefully to notice small changes. The objective of these small changes is to prove how a simple change in data can lead to a different solution. Translating this idea to real-world problems will show that it is very difficult to implement standard solutions to every type of problem.

At the end of this appendix, the solutions are included. Also included are some reference problems that show how to solve the problems. Some of the problems presented herein do not have a unique solution. In other words, there are several possible ways to solve such problems. Therefore, if your answer does no coincidence with the one provided, this does not mean that you have not solved the problem properly. Some of the answers include such sentences as, “Look at the theory” or “Graphic answer,” which means that the solution is not included.

CONTINUOUS IMPROVEMENT TOOLS

Problem IT1

Breakdowns and defective products that were manufactured for the last 15 days on a particular machining center, the CNC-27 machine, are presented in the following table:

images

The breakdown code represents each ...

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