That makes it useful for sorting a long list. It also makes it easy to over-trust.
A good score based on last year's questionnaire says little about today. Check the date before you rely on it.
New suppliers have little history, so the score leans on a few data points. Treat it as provisional.
A merger, a new subcontractor, a key person leaving. If you know something the data doesn't, trust what you know.
The score tells you where to look first. It doesn't tell you what you'll find.