Lessons learned : a guide to improved aircraft design Chapter 1. Introduction going to Disneyland Chapter 2. Lesson learned 1 display ethical behavior. 2.1. Background ; 2.2. Examples of past mistakes Chapter 3. Lesson learned 2 have fun. 3.1. Background ; 3.2. The mistakes of the past Chapter 4. Lesson learned 3 listen to the customer. 4.1. Background breaking the code ; 4.2. Examples of the past Chapter 5. Lesson learned 4 challenge the requirements. 5.1. Background ; 5.2. Examples of flawed requirements Chapter 6. Lesson learned 5 populate the design team with left and right brain engineers. 6.1. Background ; 6.2. Examples from the past Chapter 7. Lesson learned 6 the integrated product team (IPT) works use it. 7.1. Background ; 7.2. Examples from the past Chapter 8. Lesson learned 7 KISS (keep it simple stupid) ... as long as you can. 8.1. Background ; 8.2. Examples from the past Chapter 9. Lesson learned 8 Willoughby templates work ... use them. 9.1. Background ; 9.2. Examples from the past Chapter 10. Lesson learned 9 plan for variants. 10.1. Background ; 10.2. Multiple variant designs ; 10.3. Single variant designs ; 10.4. AGM 86 ALCM and AGM 129 ACM Chapter 11. Lesson learned 10 exhibit nympholepsy. 11.1. Background ; 11.2. Examples of nympholepsy Chapter 12. Epilogue Lessons Learned: A Guide to Improved Aircraft Design features a lifetime of practical insight into the aspects of aircraft design that cannot be solved via technical means. The lessons learned have nothing to do with the mechanics of doing conceptual design rather they address and influence the design teams state of mind and the human principles to be used when dealing with the customer. It is a concise informative summary of mistakes to avoid and best practices to pursue that lead to successful aircraft design programs