:- [q].

- [
 Di= defect(injection)
, Dd= defect(detection)
, Dt= defect(threshold)
, H= headcount
, L= learning
, M=artefactMaturity
, Q=artifactQuality
, R= reworkCycle
, P=dev(producivityAndReworkRate)
, Rwr=dev(andReworkRate)
, S=artifactSize
, T= projectDuration
, V=verification
, Dd + Q
, Di - Q
, Dt - R
, H +  Rwr
, H +  V
, L + R
, L + Rwr
, L - Di
, M - Di
, P + Rwr
, P - T
, Q - R
, R + M
, R + T
, S + T
, V - P
].