I was told by the Lead Appraiser that gave us the CMMI Intro Course, that the SCAMPI v1.2 MDD defines a practice as fully/largely implemented only if there is "a Direct Artifact and a Direct Affirmation" (both are a MUST). No Indirect Artifacts required whatsoever. He only mentioned they could be used for the purpose of clarifying some direct artifact. Could you explain your phrase to me?
A couple of thoughts for you. Section 2.4.2 of the MDD clearly indicates that there is only a "Direct Artifact, an "Indirect Artifact," and an "Affirmation." No "direct affirmation" is ever mentioned in the MDD. Further, the statement in the MDD that defines "Fully Implemented" reads: "One or more Direct artifacts are present and judged to be adequate; at least one indirect artifact and/or affirmation exists to confirm the implementation and; no weakness are noted." It then goes on to say regarding "Largely Implemented": ""One or more Direct artifacts are present and judged to be adequate; at least one indirect artifact and/or affirmation exists to confirm the implementation and; one or more weakness are noted."
So, a simple analysis of those two statements can result in the following equation: FI = (DA + (IA or Affirmation) + No Weakness). Similarly, LI = (DA + (IA or Affirmation) + 1 or more weakness). Simple.
By the way, there is a formula within the MDD that identifies a minimum amount of affirmations that are required. It's more than a one-liner though :)