I do not know how many pages you have to write, but I would suggest that you provide a brief overview of Six Sigma, and then focus on DMAIC. A key problem in each company is, that 80% of the work will be carried out by 20% of the employees. Hence working with Six Sigma often does not get many people really involved and may lead to improvement decisions where people who carry out the job become replaced and so have the opposite effect.
With view to retail banking you may concentrate on the internal processes of a bank as well discuss the question how it will affect the business for instance if they want to reduce costs by closing banks and offering ATMs instead.
I worked several years at AT&T company as an electronics technician UNDER THE SIX SIGMA program. I would be happy to tell you all about it. You may want to change the direction of your writing project to argue AGAINST six-sigma.
This system is used to monitor employees using many many parameters in order to force "constant improvement" However, constant improvement is done by subjecting each employee to UNREASONABLE scrutiny. If the employee brings up his EFFICIENCY number... then the ACCURACY will go down. Then the boss starts hammering on the accuracy numbers, and threatening JOB LOSSES if numbers are not brought up.. There are at least 50 OTHER parameters they also look at... Minutes per task... percent jobs needing repeat work... and on and on.
This is like placing a human under the control of a MACHINE. This system is not a good thing for employees to endure. All of the people I know who are under this system are under EXTREME STRESS.
Eventually --- someone might likely loose-it and go POSTAL! I worked under this system untill I couldn't take it any longer and I had to quit the $32 dollar an hour job and go to a job that pays only $10.00 per hour. My family really suffered.. and we still are suffering!
God help all us workers -- because this Six-Sigma crap is spreading to many companies.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.