The number of lines of code is irrelevant as an absolute number, just like "hits" on a web page. Say your project is 50,000 lines instead of 60,000. What's the difference? What will be done once magic number $nlines is found?

Where the measurements are important is when comparing two (or twenty) different numbers. Say you've got these measurements on your projects:

Date	Lines w/comments	Lines w/o comments
4/1 (Start)	0	0
5/1	5,000	4,000
6/1	10,000	7,500
7/1	12,000	10,000

You can see that you've been going along at a nice clip for the first two months, and then in June everything slowed down.

The relationship between lines w/comments and lines w/o doesn't exactly match, but it's close enough for you to say "Hey, look, we're slowing down."

What's important is that you track it consistently, so that the comparisons are meaningful. In the example above, if you switch measurement from with to without comments, it looks like you've made zero increase in a month, which isn't the case.

xoxo,
Andy
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I was dreaming when I wrote this, so sue me if I go too fast.