In the selection process for PPS sampling plans, it is necessary to determine the cumulative balance of the book values of the logical units.

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In PPS (Probability-Proportional-to-Size) sampling, the cumulative balance or cumulative sum of book values of the items (logical units) is used to determine the sampling interval and to select the sample items, ensuring that larger items have a proportionally greater chance of being selected.

In the Selection Process for PPS Sampling Plans, It Is