Сравнение на методи

	Пилотно многостепенно извадково изследване	Систематична извадка
Област	Методология на проучванията	Методология на проучванията
Семейство	Process / pipeline	Process / pipeline
Година на възникване	Mid-20th century onward	Mid-20th century (Cochran 1953; Kish 1965)
Създател	Survey methodology tradition; formalized in Kish (1965) and later survey practice literature	William G. Cochran; formalized in survey sampling theory
Тип	Probability sampling with pilot validation phase	Probability sampling design
Основополагащ източник	Kish, L. (1965). Survey Sampling. John Wiley & Sons. ISBN: 978-0471109495	Cochran, W. G. (1977). Sampling Techniques (3rd ed.). John Wiley & Sons. ISBN: 978-0471162407
Други названия	pilot MSS, multistage pilot sampling, trial multistage sampling, multistage sampling pilot test	interval sampling, systematic random sampling, equal-interval sampling, fixed-interval sampling
Свързани	5	5
Резюме	Pilot multistage sampling applies a small-scale trial run of a multistage sampling design before committing to the full fieldwork. The researcher draws a mini-version of the hierarchical sample — typically spanning the same stages (e.g., regions, then clusters, then individuals) — to test frame quality, stage-transition procedures, and variance estimates, then uses those findings to calibrate the main sampling plan.	Systematic sampling is a probability sampling technique in which every k-th element is selected from an ordered list of the population after a random starting point. With population size N and desired sample size n, the sampling interval k = N/n is computed and one unit is chosen at random from the first interval; all subsequent units are selected by adding k repeatedly. The method is operationally simple, yields a spread-out sample, and often achieves lower variance than simple random sampling when the list has no harmful periodicity.