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IS 4905:1968 is the Indian Standard (BIS) for methods for random sampling. IS 4905 provides standardized methods for random sampling in quality inspection. It covers simple random, systematic, stratified, and cluster sampling techniques. Referenced by virtually all IS testing standards that require sampling (concrete, soil, steel, aggregates, etc.).
Provides methods and procedures for drawing random samples from lots or consignments for inspection purposes. Covers simple random sampling, systematic sampling, and stratified sampling techniques.
IS 4905 is referenced whenever any IS testing standard requires random sampling from a lot — concrete, steel, soil, aggregates, bricks, cement, paint, etc. It is the master sampling standard.
What is the difference between IS 4905 and IS 2500?+
IS 4905 covers HOW to draw random samples (sampling techniques). IS 2500 covers acceptance sampling PLANS — how many samples to test and what acceptance criteria to use.
How do I select random samples for concrete testing?+
Use the random number table in IS 4905 Table 1. Number all units in the lot, then use random numbers to select which units to sample. For concrete trucks, number them sequentially and use IS 4905 to pick which ones to test.