Men, Machine, money, method and materials of management is called as

----------------- is one of the strategy for customery retention.

In SPC, ---------------- are tools which allow for easy collection and anaysis of data.

ISO 14000 is a generic standard primarily concerned with 

The control chart for variable is 

Find the median of the given Data 

529, 429, 593, 421, 583, 430, 408, 557, 575, 437