Could anyone inform us with what does Quality Case mean? and how it could be beneficial for TQM?

Hope you are talking about "Case for Quality" or"Economic case for Quality"...

This definitely needed to assess the economic case for Quality, ie why we should invest in Quality? Is this investment pays back?

There are lots of studies conducted and papers published on this topic. It is found that Quality management practices impact bottom line, Market metrics and internal processes. The study also revealed Quality is a linkage between Business strategy and Business performance!

Study report indicates, Business with superior product quality were more profitable than the businesses with inferior quality products. Good quality is linked with Strong customer loyalty, less vulnerable to price fluctuations and lower marketing cost!! Along with this employee satisfaction levels were higher in those companies.

This need not be a study within the organization always, rather this should be the impact of companies Quality management to external world..... There are ways to measure them for the organizations to know what level they are at - Customer satisfaction surveys gives lot more information, Customer feedbacks, Benchmarking with competitors, etc.

This is a good case show, how investment in TQM will benefit the business performance.

Hope this the information you were looking at.. ASQ has these articles in their site. If you are a member or your organization is a member, you can pull these articles....

Quality mean :Customer staisfaction by meeting customer requirments.