When I first saw the Programming Motherf**ker manifesto I thought it was ridiculous, but I'm not all that inveighs now. Even though I'd still call it silly it has some kind of point, because lately I've consciously been moving away from safety and coming closer to performing. I'm backing a couple of steps toward where I once was, the pragmatic programmer moving quickly just doing stuff. That was before I was infected by Agile.
Slowing downDoing agile is a lot about safety where you time box stuff in short iterations with up front estimates, which is good in many ways. But when you spend too much time preparing, planning and estimating it stabs you in the back in the end. Your velocity would be better if you just did something, instead of four of us playing planning poker about if this is a one or two point story, and how you'd best divide it in tasks. I've also had problems with endless retrospective meetings and ad hoc discussions about how we work.
Also TDD and Unit Testing can have the same problem; it can easily be overdone. It's great in so many ways, but you need to keep a good balance between safety and productivity. I'm a big fan of Unit Testing, don't get me wrong, it's just that I don't think you need to test everything. Nor do I think you need to inject every single dependency. More on that later.
Speeding upI came to notice a course by Dan North called Faster Software Delivery, held in Norway, which sounded really interesting to me. It seems to address exactly this! But since I live in Sweden I asked him on Twitter if there was any book or screencast on the subject, but unfortunately no. A book is in the writing though! However he pointed me to a talk he's been doing on a couple of conferences called Patterns of Effective Delivery. I found a good webcast of it here. You really should watch it when you're done reading this post!
At Facebook they have a culture inherited from Mark Zuckerberg encouraging to do stuff fast. Mark has this saying, "Move fast and break things", claiming that if things don't break you're not moving fast enough. Just shortly ago we often saw that in production, but now it seems they've either slowed down or put a wall of testers between the fast moving programmers and the production environment as I haven't had much problems with Facebook lately. They also have it written on their walls that "Done is better than perfect" to remind themselves to always keep shipping... that's something I really can relate too and actually put up that poster on a wall next to my desk!
Talking too muchSince I started doing Agile I've had a lot of more meetings than before. Meeting are good though, making sure we're doing the right thing and keeping every stakeholder up to date with the outcome. But since we have them frequently it's important to keep them short and to have them when needed.
Changing too muchBeing open to change is a cornerstone in Agile, and we should be – both in what we do and how we do it. But if we’re too open to change it becomes a problem. It may be adopting a new hot technique without the need for it, merely because there’s a lot of fuzz around it. It may also be not giving the ideas from the previous retrospective a fair chance before changing again or changing back to normal as we can’t manage the work to apply the decided change.
Continuity is needed for any methodology to work, so we can’t expect something to solve the problem in the first week. If something is obviously bad you should of course drop that practice directly but make sure you give your ideas a fair chance before ditching them and trying the next.
Prototyping too muchPrototyping is generally a good practice, where we invest as little as possible to gain as much knowledge as possible. We need to make sure though that we don't invest too much in the prototype though, as it would take away the benefit. Prototypes should be quick to make and shown to the stakeholders as soon as possible, and once the general idea is decided it should be terminated. Optimal efficiency is reached when the prototype is hand drawn with the client present and participating.
In some cases it may also be advisable to use tracer bullets instead of prototypes, a technique from the book The Pragmatic Programmer. Instead of creating a prototype you start writing the code with a first decent idea of how it should be and forge it to perfection through continuous feedback as you go.
Estimating too muchEstimates come to a price, and that price is that it takes time. Hence, by estimating, it will by definition take more time to do something. The more time you put into the estimate the more time will be added to completing the task. Here you need to find the balance between certainty and effectiveness. How much is the estimate worth? And we all know that estimates, however much time was spent making them, are estimates and not promises.
Testing too muchUncle Bob says he demands 100 % code coverage. What a terrible waste of time for most projects! If you do pacemakers or deal with nuclear devices, fine, but if you do a corporate web site? Hell no! Test logic, test states, but don't test that the text you enter in the CMS show up on the web page - you'd notice if it didn't - and no one would be harmed if it failed to!
Unit tests are great in so many ways, but you need to keep a good balance between safety and productivity. I'm a big fan of Unit Testing, don't get me wrong, it's just that I don't think you need to test everything. For example obvious things. Or tons of nuances. Find all paths through the code and make sure a test case cover them. Would ever a bug occur, add a test for it and learn from it what kind of test you were missing. Certainly a useful one.
Kent Beck sent out an excellent tweet a while ago; "First you learn the value of abstraction, then you learn the cost of abstraction, then you're ready to engineer". In the first 10 minutes it was retweeted by 91 and favorite by 24!