The holistic view of Managing and improving your spend baseline is rather simplistic but worth getting structured. You shall consider a) 3 major levers: Supplier , Demand and Cost management – and b) 2 dimensions -Speed (term to implement) and Organisational impacts. From there, you’ll land on the table below which lists 55 different ways to get your TCO down.
Good to spread best practice… see the next version which includes another major pillar Customer Management plus more levers in the next version of Procurement Leaders – Global Intelligence Network magazine.
Let me know if you want more detail or how to apply this to your category management activities.