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- Newsgroups: comp.software-eng
- Path: sparky!uunet!cis.ohio-state.edu!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!nucsrl!travis
- From: travis@eecs.nwu.edu (Travis Marlatte)
- Subject: Re: Software Inspections. How many does it take?
- Message-ID: <1992Dec17.231020.7917@eecs.nwu.edu>
- Organization: Rauland-Borg Corporation, Skokie IL
- References: <1992Dec14.192008.15480@gallant.apple.com>
- Date: Thu, 17 Dec 1992 23:10:20 GMT
- Lines: 64
-
- In article <1992Dec14.192008.15480@gallant.apple.com> neumann.m@applelink.apple.com (mark neumann) writes:
- >But what about module level design/code
- >inspections, where the work being inspected is the result of one persons
- >effort?
-
- This is probably where one needs a review the most. One person designing
- and coding a segment of code needs to have someone else check it out.
-
- >It seems obvious that having someone check your work is a good idea. It
- >also seems that each additional person that checks your work is less
- >likely to find a problem (on average).
-
- This can be true if you invite people to a review just to fill in seating
- space in the conference room. If, on the other hand, you invite people
- who have expertise in specific areas, their collective perspective is
- much broader than any one of them.
- >
- >My question: Is one person enough? Does anybody else use a single
- >reviewer approach?
-
- The approaches that one finds in the text books really deal with large
- software projects. If I am designing and coding a major subsystem of
- a large project, the interactions that my code will have with other parts
- of the system and the outside world require me to invite a large number
- of people to a review. Each one may have insight to a particular
- interaction that none of the others does.
-
- If I am making a small change or coding a small section that is fairly
- confined in the system, I really only need to have one maybe two people
- take a look at it. I'll probably throw a copy on their desk and ask them
- to take a look at it.
-
- >
- >I believe that there are interpersonal dynamics which make one reviewer
- >more effective than two of more. With two or more people, the ego of the
- >person whose work is being reviewed is more likely to become a factor.
- >
- >Finally, by assigning a single reviewer to inspect someone elses work,
- >that person is obviously responsible for any flaws that get through, so
- >he/she is likely to take the role seriously. (Note: you probably do not
- >want to assign people to inspect each other's work, since they may agree
- >to just trust each other completely).
-
- This is a big issue with reviews. An organization must mature to the point
- where egos are not a problem. It only takes a couple of well run reviews
- to get people used to the idea.
-
- Having the reviewers sign off on a review to make them responsible is
- good on paper but doesn't translate to anything in the real world.
-
- In the end, when the bug gets reported, the person managing the code
- will be responsible no matter who coded or reviewed it. Reviewers should
- take the responsibility seriously with a desire to share their insight
- to improve software quality. Authors should take suggestions graciously
- with the same attitude.
-
- Any discrepencies in attitude should be handled with philosophy not
- policy. Noone should attend a review they don't want to be at. It is
- a waste of time for him or her and counter-productive for everyone else.
-
- --
- Travis Marlatte
- travis@eecs.nwu.edu
- 708-297-0055
-