What is the difference between direct and indirect measures?

There are two types of measurement in software engineering process.
 Direct measure and indirect measure.
 Direct measures include cost and effort applied in the development of software. Direct measures of the software include how many lines of code (LOC) produced, execution speed, memory size, and defects reported.
 Indirect measures include functionality, quality, complexity, efficiency, reliability, and maintainability of the software.
 Direct measure is easy to compute compare with indirect measure of software. We can calculate the cost of the software development but it is difficult to calculate the functionality and quality of the software.