Workability
How easily fresh concrete can be placed, consolidated, and finished without segregating. It is a practical quality that slump only partly captures.
What does workability mean?
Workability depends on more than water content: aggregate shape and grading, sand content, admixtures, and cement fineness all change how concrete behaves under a screed. A harsh mix with angular stone and not enough sand can have adequate slump and still be miserable to finish. Getting workability right is what separates a mix that pours well from one that technically meets the spec.
In practice
Crews judge workability by feel within the first few minutes of discharge, long before any test result exists.