Some IT procurement practices do more harm than good. For example, sharing a vendor's pricing with another vendor. You may be able to get a slightly better price on a few deals, but eventually, no vendor will want to do business with you. Secondly, putting a vendor through too many fire drills. Eventually, the cost of accommodating your recurring panic attacks shows up in your price, as the vendor attempts to adjust the profit based on their level of effort. Also, asking your vendor to pay for every mistake will cost you higher prices on future orders and can eventually cost you the relationship. Other mistakes include using RFPs or RFQs and ignoring the responses and using a vendor exclusively to get a quote to help beat down your first choice.

Read more about what not to do in IT procurement:
- read the blog at CIO