This text says, "NORMSINV uses an iterative search technique". This is specifying an implementation, not a testable performance criterion. Other approaches should be permitted.
Keep the suggestions, but put them in informative Notes or Guidance.
NORMSINV Part 4, Section 3.17.7.229
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Proposed Disposition of DIS 29500 Comment US-0215 (Modified: 2007-11-05) Agreed; the following changes will be made to Part4, ยง3.17.7.229, page 2,726, lines 7 and 13: Description: Computes the inverse of the standard normal distribution. The distribution has a mean of zero and a standard deviation of 1. NORMSINV uses an iterative search technique. … However, if probability < 0 or if probability > 1, #NUM! is returned. An implementation uses an iterative search technique, and t T he search has not converged after an implementation-defined number of iterations, #N/A is returned. Similar Comments: CL-0154 , CO-0198 , FR-0476 , GB-0418 ,
