One of the values of the agile approach — responding to the uncertainty. Agile tools, especially Jira, are assumed to fit an unclear and changing environment. Add-ons help Jira users extend the standard functionality and make the tool even more flexible and tailored. Our Rozdoum team recently released an app which reflects options in time evaluation. The Range Estimate add-on for Jira adds a pessimistic estimate to an issue and forms an estimation range along with the original estimate so that an issue’s progress can be followed.