The business
Supplies systems to aircraft manufacturers and then supports them for the life of the aircraft. New equipment is thin-margin and contractually gets cheaper every year; aftermarket spares and repair earn about three times the margin off a fleet that keeps growing long after build rates peak.
Two workbooks, easy and hard, built from one model. Four years of history, four years to forecast, and a balance sheet that has to close.
Inside each workbook
- Instructions
- What you're building, the rules, how it is marked, terms of use, disclaimer.
- Test
- The sheet you work on. Shaded cells are yours, blue cells are given and locked.
- Solution
- The finished model with live formulas.
- Scoring
- Cell-by-cell result plus an overall percentage.
A toggle at the top of the Test tab stays on N while you build, so you are working blind. Flip it to Y and every cell you filled turns green or red in place — no separate answer key. Values are compared, not formulas, so any construction that lands on the right number scores. The in-sheet coloring needs Excel 2010 or later; the Scoring tab works in any version.