You can get away by – Sorry, I was busy!
You can rush the Project team for a report, and the report sits on your desk, collecting dust.
You know that there is a cost associated with every pending decision.
Consider that the Project team has proposed an additional scope to automate procurement processes. You will save 200 hours of labour each month; if you sit on the decision for two months, you lose 2X200X$100 = $40,000.
Your position may allow you to sit on a decision; however, consider the cost of sitting on a decision!