How to determine the size of a project (lines of code, function points, others)

Question

How do you rate the size of the project?

Part A: Before you start a project.

Part B: For a complete project.

I am interested in comparing unrelated projects. Here are a few options:

1) Lines of code.

• I know this is not a very good indicator of productivity, but is this a reasonable measure of project size?
• If I wanted to estimate how long it would take to recreate a project, would that be a smart way to do this? How many lines of code should be evaluated in the afternoon?

2) Functional points.

• Function points are defined as a number:
  • Inputs
  • exits
  • asks
  • internal files
  • external interfaces
• Does anyone have a point of view on whether this is a good measure?
• Is there any way ** to do this?

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