計けい画かく段だん階かい

け

い

か

く

だ

ん

か

い

Meanings

1

noun

planning stage; planning phase

Refers to the phase in which plans are being made, before implementation.

plot, plan, scheme

画brush-stroke, picture

段grade, steps, stairs

階storey, stair, counter for storeys of a building

計けい画かく
計画 is a plan itself, while 計画段階 refers specifically to the stage of planning.
段だん階かい
段階 means a stage or phase in general; 計画段階 is a compound specifying the planning stage.

Compound of 計画 (plan) and 段階 (stage, phase).