- Correspondence to Dr Douglas A Wiegmann, Department of Industrial and Systems Engineering, University of Wisconsin-Madison, Madison, Wisconsin, USA;
- Accepted January 8, 2019
- First published January 25, 2019.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.