The free-to-download pdf textbook Decision Modeling is now in Version 2.1.0, released October 1, 2020. This book emphasizes formulation rather than algorithms, and uses both LINGO and the Excel Solver. It can be downloaded from https://linney.mun.ca/pages/view.php?ref=36808.
The main change from Version 2.0.1 is that an example of the travelling salesman problem has been added to Chapter 6. Because quite a few people already have the solutions to all the end-of-chapter problems, I have attached the revised solutions to the Chapter 6 problems, which now includes a TSP example.
If you wish to receive the complete set of nine solution files, please email me at dtulett@mun.ca.
-- David M. Tulett, PhD Associate Professor Faculty of Business Administration Memorial University St. John's, NL, Canada, A1B 3X5 dtulett@mun.ca