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Chris Lilleyon 3 August 2011
Transcript of Agile Smells
Contra-indicators Something fishy... Other things to keep a nose out for:
Frequency of status updates increases
Individual "Velocity" metrics
Technical debt ignored at all costs
Pairing is "too expensive"
Developer churn rates ...but some things smell good: Kanban Flu Cross-functional socials Product Owners run the Kick off's Adam Wright email@example.com www.blackpepper.co.uk Kent Beck: Smells smells are Common code smells
Duplicated code: identical or very similar code exists in more than one location.
Long method: a method, function, or procedure that has grown too large.
Large class: a class that has grown too large. Also a God object.
Feature envy: a class that uses methods of another class excessively.
Inappropriate intimacy: a class that has dependencies on implementation details of another class.
Refused bequest: a class that overrides a method of a base class in such a way that the contract of the base class is not honored by the derived class.
Lazy class / Freeloader: a class that does too little.
Contrived complexity: forced usage of overly complicated design patterns where simpler design would suffice.
Excessively long identifiers: in particular, the use of naming conventions to provide disambiguation that should be implicit in the software architecture.
Excessive use of literals: these should be coded as named constants, to improve readability and to avoid programming errors. Additionally, literals can and should be externalized into resource files/scripts where possible, to facilitate localization of software if it is intended to be deployed in different regions.