How to critical discuss the relationship between research和co

According to the explanation of Cambridge,consultancy is the activity of giving advice on a particular subject.Research is used to investigate the situation of a particular subject.Some difficulties and threat may came out.Based on what research find out,consultancy can give some advice.For instance:future strategy.
That's my personal understanding.
To get a clear ideal,you may need to borrow some business research method related books for library.
PS I am sweeney ^^