Soft Systems Methodology, as described in this book, addresses projects where the outcome is undefined. There is a desire to improve things but how and what have not been specified. There is a framework for identifying key factors in the problem area and then a series of case studies, in the management arena.
I have tried to read this several times but found it impossible to identify anything tangible. The case studies could only be more boring if you had actually had to participate in them, and the theoretical discussions just seem extremely waffley. It also features lots of ugly hand-drawn diagrams so common in books of this era.
Go for a later book but check whether this idea has got more crisp and exciting first.