yes,,,,the standard ppl visit factory and certify which is a long procedure,even these used for special and important and non iso for others which are more r less meeting requirement..
moreover changing entire set up to suit those standards is (initial) costly investment..like hospitals ,offices where iso standards and non iso standards..(corporate hops r very costly)A committee of experts visit factories,offices,hospitals and advice changes and some times entire setups which involves...
more... capital cost and even they insist of changing staff and insist for qualified..where as a experienced worked even with no basic education ..and takes less salary.
i have seen in rly electrification works ..a workr from bihar and bengal atre very expert in mouding copper rings for traction wiring at very cost