# Make-or-buy cost comparison
# Scope: Linear fixed/variable cost comparison; account units, capacity effects omitted.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

quantity = 1000
fixed = 5000
makeUnit = 5
buyUnit = 12

makeCost := fixed+quantity*makeUnit
buyCost := quantity*buyUnit
savings := buyCost-makeCost

check make cheaper example: savings >= 0

scenario alternative: quantity = 800