ASP, The Art and Science of Practice: In Search of the root N+1 Rule

作者：Rudisill J Frank^*

来源：Interfaces, 2010, 40(2): 154-158.

DOI：10.1287/inte.1090.0461

• consulting
• OR/MS: education, implementation
• sampling

In over 25 years of consulting in operations research, management science, quality management, and statistics, I have come across several rules of thumb that practitioners use frequently, but incorrectly. One is the "square root of (N) + 1" rule used in sampling and inspecting raw materials and finished goods. This paper describes several of my encounters with this rule and the circumstances of its use. I discuss how I used a nested design experiment to demonstrate to users that the rule was not appropriate for their situations. The paper also includes a "top 10" list of other rules of thumb and beliefs that people often use incorrectly. I of fer tips that have helped me avoid these rules.

• 出版日期2010-4