Can you be Agile without doing TDD (test driven development)? -- the question was asked
M_Kevin_McHugh 270001CDK4 Visits (3881)
The question was asked: "Can you be Agile without doing TDD (test driven development)?"
The original question as well as several excellent answers was posted on (pro
Short answer: Yes.
In my experience, Agile is about picking the right level of Lean-ness for the project at hand. What do I mean by Lean-ness? And, why do I bring it into this answer?
Lean does not mean chopping everything possible out of your method. As one of our colleagues noted, you do not have to include TDD or Unit Test into your behaviors. However, in the project context you find yourself, it may or may not be beneficial.
Let's think about the supply chain for a large unnamed retailer located in AK. There is the consumer. They go into the store. The store receives various products via truck. The trucks, presumably, get those products from a warehouse. The warehouse is filled by shipments from various manufacturers. The manufacturers in turn have whole chains of supply themselves.
What happens when the general manager for shipping in the above supply chain is told that he will get a $1 million annual bonus for every year that he has less than 10 trucks in the fleet? He will immediate chop the fleet to 9 trucks. This scenario, this will drive up the amount of goods stored in the warehouse (driving up cost in that node). And, it will "starve" the store fronts.
So, the overall supply chain suffers if local optimization is allowed without consideration of the whole.
Back to TDD and Unit Test (UT). TDD is a requirements expression mechanism. The system MUST perform to those constraints. Fair enough. TDD can replace Use Case Drive Development's requirements behavior or User Story Driven Development's requirements behavior. It has the "leaning" benefit of combining the Unit Test and Requirements work loads. It is a benefit if the overall work load is reduced. It is not, if the overall supply chain's work load is increased (let's fix quality).
And so, you asked: Can you be Agile without doing TDD (test driven development)?
Sure you can. A different, and perhaps better, question is:
-- If I apply TDD to this project, will it result in an overall more efficient delivery of software or a less efficient?
'And it is also said', answered Frodo, 'Go not to the elves for counsel, for they will both no and yes.'
So, in the end, ... it depends. You must answer the question. Which path will most efficiently lead you to your desired goal(s).
To TDD or not to TDD... That remains the question. :-) My apologies to Shakespeare
M Kevin McHugh