質(zhì)量管理基礎(chǔ)ppt講義講義02-質(zhì)量檢驗-資料下載頁
2025-10-08 01:09本頁面
【正文】 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 系統(tǒng)抽樣 每隔一段時間或一定編號進行，而每一次又是從一定時間間隔生產(chǎn)出的產(chǎn)品或一段序號產(chǎn)品中任意抽取樣本。 多用于流程性產(chǎn)品的抽樣。 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 分層抽樣 根據(jù) 不同的生產(chǎn)條件 （不同 的加工設(shè)備、操作者、操作方法 ）將 產(chǎn)品分層（ 分類 ），在 每層 按照生產(chǎn)比例抽取若干樣本。 分層的目的是為了保證 足夠的代表性和覆蓋率 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 第 1層（類 /組） 第 2層（類 /組） 第 3層（類 /組） 第 4層（類 /組） 抽樣檢驗分類 計量型抽樣檢驗 有些產(chǎn)品的 質(zhì)量特性是連續(xù)變化的 ，如燈管壽命、棉紗拉力、炮彈射程。用 抽取樣本的連續(xù)尺度 定量地衡量一批產(chǎn)品質(zhì)量的方法稱為計量型抽樣檢驗方法。 計數(shù)型抽樣檢驗 有些產(chǎn)品的質(zhì)量特性，如焊點的不良數(shù)、測試壞品數(shù)以及合格與否，只能通過 離散的尺度 來衡量。 這種抽取樣本后通過離散尺度衡量的方法稱為計數(shù)型抽樣檢驗。 計數(shù)抽樣檢驗方案 一次抽檢方案（ N, n, C） N：批量 (檢查批中單位產(chǎn)品的數(shù)量 ) n：隨機抽取的 n件待檢樣本 C：預(yù)先規(guī)定的合格判定數(shù)（允許的不合格數(shù)最大值） d： n件中發(fā)現(xiàn)的不合格產(chǎn)品數(shù) d= C： 接收（ 批產(chǎn)品合格 ） d C： 拒收（ 批產(chǎn)品不合格 ） 二次抽檢方案（ N,n1,n2, C1,C2） N：批量 (檢查批中單位產(chǎn)品的數(shù)量 ) n1/n2：隨機抽取第 1/2個樣本 的大小 C1/C2：抽取 第 1/2個樣本 時的合格判定數(shù)（ C1C2） d1/d2： n1/n2件中發(fā)現(xiàn)的 不合格產(chǎn)品數(shù) 第 1次抽樣 n1： d1=C1：判定批產(chǎn)品合格 (可接收 ) d1C2：判定批產(chǎn)品不合格（拒收） C1d1=C2：不能判斷，第 2次抽樣 d1+d2=C2：判定批產(chǎn)品合格 d1+d2 C2：判定批產(chǎn)品不合格
教學課件相關(guān)推薦
鄂ICP備17016276號-1