I once wrote a time-and-attendance app for a small company I worked for (using Rails 2.x). I put an export function in it, so that the office manager could dump

I once wrote a time-and-attendance app for a small company I worked for (using Rails 2.x). I put an export function in it, so that the office manager could dump the week's hours, pull it into Excel, and run pivots on person-time-per-project (to pay employees) and project-time-per-customer (to bill customers). After a few weeks, it was clear that the office manager wasn't "getting" how to do this, despite a couple of explanations, so I removed the export, and simply generated both pivot tables in a page. This solved the payment/billing problem so well, that, last I heard, they were still using this application 8 years after I left.