The evaluation of complexity in software system remains a challenge for software developers, engineers and testers. The ICCP metric was recently derived to find the software complexity that may occur due to coupling between elements at package level. Using the ICCP metric, a software tool (SICCAT) was developed recently to find out the same. Our aim is to discover the usability of the newly proposed tool, SICCAT. Based upon the usability score, we can determine whether the system works with their intended users and improve the design of the system if needed according to the user requirements. This will help the software developers to find the software complexity using SICCAT because of its ease of use.