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計數值抽樣計劃

計數值抽樣計劃. 使用 MIL-105D 表. 表 10-1 Sample Sizes Code Letters. Table10-2 Single Sampling Plans for Normal Inspection. Table10-3 Single Sampling Plans for Tightened Inspection. Table10-4 Single Sampling Plans for Reduced Inspection. Table10-5 Double Sampling Plans for Normal Inspection.

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計數值抽樣計劃

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  1. 計數值抽樣計劃 • 使用MIL-105D表

  2. 表10-1Sample Sizes Code Letters

  3. Table10-2Single Sampling Plans for Normal Inspection

  4. Table10-3Single Sampling Plans for Tightened Inspection

  5. Table10-4Single Sampling Plans for Reduced Inspection

  6. Table10-5Double Sampling Plans for Normal Inspection

  7. Table10-6Double Sampling Plans for Tightened Inspection

  8. Table10-7Double Sampling Plans for Reduced Inspection

  9. Table10-15Table for Sample-Size Code Letter: KOC Curves for Single Sampling Plans

  10. 應用範例一 • Q.假設有一批產品數量為750件，AQL=2.5%，採單次抽樣計劃、正常檢驗，試求(a)樣本大小，(b)在可接受條件下最大不良數為多少，(c)最少需幾個不良品方得拒收該批。 • A. 1.選一般檢驗水準II • 2.查表10-1得檢驗代字為J • 3.查表10-2得檢驗樣本大小為80 • 4.查表10-2，由代字J和AOL=2.5%得Ac = 5, Re = 6 • 5. 不良數少於或等於5個時，允收該批貨；大於或等於6個時，拒收該批

  11. 應用範例二 • Q. 如同範例一，但改採加嚴檢驗。 • A. 1.選一般檢驗水準II • 2.查表10-1得檢驗代字為J • 3.查表10-3得檢驗樣本大小為80 • 4.查表10-2，由代字J和AOL=2.5%得Ac = 3, Re = 4 • 5. 不良數少於或等於3個時，允收該批貨；大於或等於4個時，拒收該批

  12. 應用範例三 • Q.批量3000單位，AQL=1.0%，採單次計劃及正常檢驗，求(a)若該批貨有2%或3%不良率時，該批貨被拒收之機率有多少？(b)若該批貨被拒收，則檢驗樣本至少有幾個不良品。 • A.1.查表10-1得檢驗代字為K • 2.查表10-2得樣本數為125個 • 3.查表10-15(part a)，由橫座標之2%劃一垂線，交AQL=1.0%，再由此交點化一水平線與縱座標相交，交點處為75%，得知不良率為2%時，允收機率為75%。依同法可得不良率為3%時，允收機率為52%。 • 4.查表10-2，由代字K及AQL=1.0%，可得AC = 3, Re = 4, 因此若不良數大於等於4個時，拒收該批貨。

  13. 應用範例四雙次抽樣計劃 • Q.批量為2500單位，AQL=1.0%，採正常檢驗計劃，求(a)第一次抽取之樣本數，(b)列不良數若為下述狀況，請問如何做決策？ • 不良數為0 • 不良數為1 • 不良數為2 • 不良數為3 • 不良數為4 • 不良數為5

  14. 應用範例四(續) A.1.查表10-1得代字 K 2.查表10-5，由代字 K得第一次樣本數為80，第二次樣本數為80 3.第一次抽樣之判定準則為Ac=1，Re=4，第二次抽樣之判定準則為Ac=4，Re=5

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