Planguage (Planning Language), developed by Tom Gilb, is a structured, keyword-driven notation designed to define project requirements, quality attributes, and goals precisely. It eliminates ambiguity in nonfunctional requirements by defining metrics, stakeholders, and targets for, example:
Tag: Unique ID (e.g., Performance).
Meter: How to measure (e.g., "Time for report").
Target: The desired level.
It is a key part of Competitive Engineering and Evo (Evolutionary) project management.