微生物檢測是食品業的重要任務。致病微生物將食物材料污染成簇或一群個體細胞。細菌在整個食物中遵循零膨脹的負二項分配（ZINB）。為ZINB開發了雙重抽樣計劃（DSP）。我們提供R-code來決定第一階段的計劃參數，例如樣本大小、接受值和拒收值（n1，c1和r1），以及第二階段的樣本數量和接受值（n2和c2）。在給定的允收品質水準(AQL)值，拒絕水準(LTPD)下兩個風險值α和β。使用各種參數（φ，p_1，α，p_2，β）的模擬數據來說明應用。

Microbiological testing is an important task in the food industry. Pathogenic microorganism contaminates the food material as clusters or group of individuals cells. The bacteria follows a zero-inflated Negative Binomial (ZINB) distribution in the entire food material. A double sampling plan (DSP) is developed for an ZINB distribution. We also provide R-code to determine the plan parameters such as the number of sample size, the acceptance number, and the rejection number on the first stage (n1, c1, and r1), and the number of the sample size and the acceptance number on the second stage (n2 and c2). Under given value of (acceptable quality level (AQL), lot tolerance percent defects (LTPD) two risk α and β. Simulated data with various of parameters (φ,p_1,α,p_2,β) are used to illustrate the applications.

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