Why a data inventory beats jumping straight to charts
What to catalogue before drawing the first spend map for an enterprise purchasing team.
Beautiful charts built on half of last year’s invoices create false confidence. Before we draw a spend map for a client, we inventory what actually exists: purchase-order extracts, invoice archives, contract lists, and the people who know which plant codes mean what.
List each source, its owner, its date range, and its known holes. Facilities ledgers that stop at the Bangkok office while plants file separately should be named. Currency mixes and intercompany charges should be flagged. This inventory becomes the first appendix of the engagement, not an internal footnote.
Only after that list is agreed do we choose which visuals to build. Some categories deserve heat maps; others need a simple supplier ranking until cleaner data arrives. Purchasing leaders respect that honesty more than a polished pack that quietly omits three sites.
If your team is impatient for visuals, share a rough working chart clearly labelled “draft — incomplete plant data.” Transparency keeps trust intact while the real inventory finishes.