"What you give is what you get"
Vendor response time to your requests is heavily dependent on the information you provide within the request.
For example, creating a request and simply calling it "Work Uniforms" with very little info in the description field may not yield the most ideal results.
Vendors need to know quantity, size, skillset, payment terms, and other such specifics based on what product or service your agency is looking to purchase in order to provide an accurate quote.
While there is no "one way" to do this, and it may take a little while to cover all the bases, it will give you significantly quicker results once your request is finally published.