I was recently asked to step in on a project, since the current application had issues, in retrospect related to bad design and some communication problems. So far, my design changes and testing rigor have paid off, with no errors reported during the week. Hopefully I'll be able to hand this back and move on to working on my own designs.

I'm implementing something similar, a step up from the other desig's use of a shared Excel workbook tied to an Access database, but I'll be using an Access front-end for the interface, as well as using synchronization for keeping users data up to date and performance times down; the users are spread across the continents, and a more robust back-end is not available.