Track what you bought, from whom, when, and how much you paid. Surfaces supplier reliability (on-time %), price drift (cost increases), and category spend (where the money goes).
Reports → Purchases → Summary. Total spend per period; trend chart for last 12 months.
Drill into each supplier: total spend, GRN count, average lead time (PO date → GRN date), variance (ordered vs received).
Spend by product category. Useful for "which categories are eating most of my purchasing budget?" review.
Per product, see every purchase price ever paid. Spot supplier creep — when a vendor sneaks 5% increases every quarter.