Ritically critique the models porters five forces and the buyer decision process.

Critical Literature Review (The difference here, compared to the proposal is the critical element. This section must critique the models and show evidence of wider academic reading on the subject being covered in the research. Critical can be strengths and weaknesses but should also aim to include supporting or differeing perspectives or views from other academics.) the company i am doing my research on is a supermarket in the UK called Sainsburys. The question to my research is what is the drive behind sainsburys increase in sales. Please use quotes from books to critique the selected models. Use academic books and websites and journals. This literature review is going to form a huge section of my assignment. If there are more questions umyou would like to ask do not not hesitate.
The models that i want you to critically review are 1. Porters five forces
2. The buyer decision process.