Experiments : planning analysis and optimization This Third Edition covers design of experiments and integrates computer experiments with other design topics. The main changes in this Third Edition are two new chapters one on computer experiments the other on optimal design. Computer experiments have become very popular in experimental design because increasingly more and more experiments are conducted on a computer such as running finite element simulations instead of conducting physical experiments. This book starts each chapter with a real experiment. Then the authors develop the needed tools in subsequent sections. Finally the chapter ends with the application of these tools to the experiment. Each chapter includes exercises and the authors have added new exercise problems with selected solutions to the Instructors solutions manual. This is an ideal book for design of experiments courses at the upper undergraduate and graduate levels. It is also a valuable resource for practicing engineers and statisticians. Design of experiments (DOE) is a systematic method to determine the relationship between factors affecting a process and the output of that process. In other words it is used to find cause and effect relationships. This information is needed to manage process inputs in order to optimize the output