Simple Issue Tracker

I am looking for a simple to use web based Issue Tracker. It is to be used by service pesonal that is not always that familiar with software systems. We are monitoring sites of streetlights and in case there is problem we need to notify the streetlight service personal. We would like an Issue Tracker. I just want to make clear that this project may not be realized since we are also looking at other options such as using on-line Issue Trackers. At this point I do not have any detailed requirements but as an Issue Tracker is rather generic I thought I could start looking into the approximate cost. ## Deliverables As mentioned I think a Issue Tracker is rather generic so maybe somebody already has an Issue Tracker that can be customized or there is an open source issue tracker that can be used. We as the role of a Streetlight System Operator will have different users/customers so the software must be able to handle different customers. The first step could be a bid for a creating a requiement speceification. I have attached a document with some further description (not that much but will give an idea).