All entries for Monday 26 November 2012
November 26, 2012
Today I tried to identify what are the differences between two types of control charts: average and range chart VS individual and moving range charts. It was important for me to know the key features of both charts, because I wanted to use one to control the sales process.
As I understood, to decide which chart to use you have to know how many subgroups you will consider in your process. For example I am considering sales – so, basically this is ONE subgroup, which means that I need to use Individual and Moving Range Chart. If I had 3 or 5 subgroups it will be much easier for me to use Average and Range Chart. It seems to be not so difficult, BUT!!! One thing is choosing and building a chart and another is analysing and describing it.