<prompt> Translate the following text to EnglishLengo la mfululizo huu ni kutoa GAO watathmini mwongozo kwa masuala mbalimbali ya ukaguzi na tathmini mbinu, kuelezea maombi, na kuonyesha ambapo habari zaidi ya kina inapatikana.  <response>: The purpose of the series is to provide GAO evaluators with guides to various aspects of audit and evaluation methodology, to illustrate applications, and to indicate where more detailed information is available. 