Tea Tušar, Jordan Cork, Andrejaana Andova and Bogdan Filipič

Abstract
This paper presents the Optimization Problem Inspector (OPI) tool for assisting researchers and practitioners in analyzing industrial optimization problems and their solutions. OPI is a highly
interactive web application requiring no programming knowledge to be used. It helps the users to better understand their problem by: 1) comparing the landscape features of the analyzed problem with those of some well-understood reference problems, and 2) visualizing the values of solution variables, objectives, constraints and any other user-specified solution parameters. The features of OPI are presented using a bi-objective pressure vessel design problem as an example.