[kaliszad]

You would be surprised. I have unclogged processes inside and between companies before where people would tell me it's not possible or that success is unlikely.

And yes, if you are working with professionals most expenditures can be planned well in advance so you definitely can take months or even more than a year in the process. If there is a major issue affecting the business of the company you would be surprised what is possible. I've got things approved in weeks in an enterprise of 2000+ employees before and I was 5 levels down from the CEO then. I have improved my negotiation skills greatly since then (it helps when you co-found a consulting company).