Yes,  they measured all components of properties and split them into different depreciation categories.  

@Will CraygerWill,COC (cash on cash) measures the return realized in a given year to the cash (equity) invested to earn it:$100,000 annual cash flow / Equity = 10%If the property is held for a period of years, the coc can be calculated by adding the total cash flows received over the holding period and dividing the total by the equity invested and dividing that amount by the number of years the property was held.ROI (return on investment) measures the overall return realized (which includes all cash flow and cash proceeds) divided by the total capital invested in the property:$1,000,000 cash flow and net sales proceeds/ $4,000,000 investment = 25%

Today is the first day I actually measured my space and I'm just now realizing I only have 14 1/2 inches of depth to the door frame. 

@Chase Gochnauer You are not kidding when you state that Altoona is a little picky when it comes to their rental inspections but I suppose it is in good measure.

For example, Hawaii has created vacation destination zones specifically for this purpose, and other counties across the country have similar measures in place.

We will see.It all depends on what works best for you, if you have done well with it you can keep them, although you can try only at very specific times changes and measure results. 

This data set would be a metric representation of the market direction and strength of that direction, be it growth, decline, appreciation, depreciation.I created my own algorithm for calculating such data and disseminating it into a charitable data representation, but that is just me and my own understanding of how I feel things should be weighed and measured.

What are you using to measure what general contractor to hire?

Are there certain ratios one should use in order to measure whether or not a real estate investment is wise?

The index measures the number of months it would take to sell the supply of homes on the market at the current sales rate.