I spoke recently with a senior project manager who is looking for a new job. I offered to review her resume, and she told me she didn't think she needed it. She had the “secret sauce” to a great resume: every single line on the resume answered the “so what” question.
If she has some experience such as, “Led a project about whatsit and whosit,” she then writes the so what answer, “which saved the organization x in operational costs” or “which gained us a market position in y” or whatever the value of the project was to the organization.
An aside: If you are working on a project and you can't articulate the value, you have to wonder if it's worth your while to work on that project. (See Don't Start a Project With Scarcity.)
All of your work is valuable in some way to the organization. Hiring managers, sometimes unconsciously, look at that value and compare it to what they need.
Candidates, please review your resume and articulate your value. Hiring managers, if you do a job analysis, you will see what kinds of value you need for your organization.
The value of your resume should shine through your resume. That's what hiring managers look for. Give it to them.