Software maturity index is among the suggested method used to degree the software maintainability where it consider either that modified, added or removed on the concern modules.
The various combination of features measures such as source code clarity, quality of documentation and software understandability. Factors influencing software maintainability measurement Source code readability Most maintenance will end up modifying the source code which is a cumbersome task to undertake especially if the source code were written by a different programmer and not well organize. The percentage of source code readability is achieved by observing on the number of commentaries line from the overall code. The ratio of comments is derived from the division of comment lines by overall line codes. If the ratio is low maintainability the code is more readable. Quality of Documentation The Gunning fox index is a model that measure the document quality .it calculates how readable the words in a text are.
The fox index is determined by complexity of the words as well as its length. The better documentation quality is realized when fox index is a bit lower buts the greater the quality of documentation is poorer. Software understandability This involved combination of both documents as well as source code .The interaction of this contributes in the quality of maintainability. Otherwise the maintainability flawed and problematical to perform.
The proposed a tool for measurement was the symbols that can be incorporated within the documents as well as source code. The method was term as language software entailing the entire symbols to be used without source language and key words. The coupling and interrelationship of source code language and document language define high understandability. Fuzzy models
