FA-97679 / Knitting and sewing pattern grading / Member archive

Sleeve cap ease checker: armhole length · case 04

Every sleeve cap shows about 24 cm of ease.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Ease = cap - (front + back armhole). Allowed ease: woven 2.5-4.5, knit 0-1.5, leather 0-0.5 (inclusive; fabric trimmed, lower-case; other -> "error: fabric"). Verdict "too little", "too much" or "ok". Adjustment per side = (midpoint - ease)/2. Return [ease, verdict, adjust] with floats rounded to 2 decimals.

Why this case matters

Set-in sleeves need a fabric-dependent amount of cap ease to ease into the armhole.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
woven lower edge	`[26.5, "too much", -11.5]`	`[2.5, "ok", 0.5]`	Failed

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