Eisenhower / MoSCoW / Pareto

These are the three most widely taught lightweight prioritization presets: the Eisenhower urgent-important 2x2, MoSCoW four-bucket scope cutting, and the Pareto vital-few chart. They are famous, frequently requested, and weakly evidenced as decision tools. This skill runs whichever one was asked for honestly: it leads with the caveat, then produces that single preset with the discipline its bare template omits.

Before you run this: the evidence caveat

These three sit at tier P (practitioner heuristic, no controlled effectiveness evidence). They are not one method but a bundle of three different operations stapled together by the word "prioritization", and that heterogeneity is the central fact: Eisenhower is categorical triage by two canned axes, MoSCoW is ordinal bucketing against one implicit scale, Pareto is a descriptive concentration observation. None has a controlled or comparative study measuring it against an alternative on decision quality. The strong study quoted to make Eisenhower look evidence-backed, Zhu, Yang and Hsee (2018), measures the mere urgency effect - the bias the matrix targets - not the matrix as a remedy; borrowing that grade would be laundering a finding about the disease onto a claim about the cure. MoSCoW's best-documented failure is category inflation: anything not a "Must" rarely gets built, so users mark almost everything "Must" and the method stops where the hard ranking begins. Pareto's concentration is real but domain-dependent and usually not 80-20: Kim, Singh and Winer (2017) measured a ratio averaging about 0.73 across 22 packaged-goods categories. Never invent an effectiveness number, and never report a clean 80-20 split the data does not support.

When to Use

• The user asks for an Eisenhower matrix, a MoSCoW list, or a Pareto chart by name and you should run it honestly rather than refuse.
• A fast, cheap prioritization is genuinely wanted and the cost of getting it slightly wrong is low, and you will add the discipline the bare template lacks.
• As a quick jolt: Eisenhower when urgent noise is crowding out the important; MoSCoW when stakeholders need a shared word for "not this release"; Pareto when you want to check whether a minority of causes drives most of an effect before spreading effort evenly.

When NOT to Use