Making things measurable is an often overlooked part of our job as a PM. It sounds hard to make things tangible, but it's not. There's definitely more stuff available than you imagined. But .. don't rush. Start with thinking back about quality. What's that? It's conformance to requirements. Which requirements do u have documented? Are your objectives "s.m.a.r.t.?". If they're not, redesign them first before you start to measure something at all!
Once you tackled that, think about what you actually want to measure. Do your stakeholders understand what the concepts are in your project, do you understand them correctly? Make sure this is set right as soon as possible. Which data do you have available? Realize which data you might have but isn't available yet? How can you get that data? Once you have your data, try to realize how you might need to transform your data to get right to what you want to measure (there are entire methodologies for this, especially in the BI and CPM world, have a look at "semma" - Mother Google will tell you more). Maybe you can work with a "sample" instead of the whole data set? Try to find a statistically relevant sample.
Think about how you want to visualize. Is your target audience graphically oriented? Do they prefer text? Will u use this measurement frequently or one-time?
Are there any other measurements you can "inspire" yours on, do you know who created them or do u know anyone who's a subject matter expert on the other measurement? This is especially applicable for "soft" measurements. What are your corporate values? Can these inspire you to make your measurement more tangible? You may have a "project satisfaction survey" for your customer, but did you ever think about a "project member satisfaction survey"? Just an example to illustrate that non-tangible (or "soft") measurements can be implemented without any problems at all.
What to remember? Quality, s.m.a.r.t., which data do and don't you have. Good luck!
