Arguing Data

People have a lot of different reasons for posting blog entries. These reasons vary from financial, to personal, to professional, to I'm afraid to know more. For me, one reason I take the time when I could be doing something else is that I like to put my ideas out there to be tested. I don't really care if a majority of people agree with me so much as I want to see what other people have to say for or against certain things. The downside to this is that I'll sometimes find that an idea isn't as good as I had originally thought it was. The upside is the opportunity to refine something to be better or to discard an idea that turns out simply to be bad.

Which is why I'm glad to see Karl Seguin's response to a post I had made about DataSets. Karl's a bright guy and he has a good background in the problem domain associated with DataSet objects. He displays class, too, even when he feels I've been a bit rough in a point or two.

The School of Hard Knocks

I empathize with his experience where DataSet misuse caused much pain and suffering. I've been in similar situations and it's no fun. In a full-blown business transaction environment, DataSets have some liabilities that make them ill-suited for business-layer usage. The thing is, the opposite problem exists as well, and it's one that is more serious than people want to give it credit for: a layer of specialized, hand-crafted business objects that don't actually do anything.

I'm currently working at a place that has an extreme case of this problem. We have four entirely separate ASP.Net applications for our internal invoice processing. All four of these applications have their own set of substantially similar custom objects that are completely unique for that application. Each object doesn't do anything more than contain a group of properties that are populated from a database and write changes back to it.

I shudder to think how many hours were wasted on this travesty. It's over-complex, can't leverage any type of automated binding, doesn't track row state, and testing and debugging changes is an unmitigated pain. It's like someone attended an n-tier lecture somewhere and never bothered understanding what the point of having one actually was. Frankly, I'd prefer if the previous developers had simply put all the data access right in each individual page--at least that'd be easier to fix when something blew up.

Learning Your Craft

The thing is, my experience no more proves custom business objects wrong than Karl's experience proves DataSets wrong. That's the trouble with anecdotal experience: it feels more important than it is (it doesn't help that pain is such an efficient teacher).

The trick of learning a craft is in gaining experience that is both specific and broad. This can be tricky in a field that is as immense as software development. You really have no choice but to specialize at some point. Even narrowing it down to ".Net Framework" isn't nearly enough to constitute adequate focus for competence.

Unfortunately, Karl's point that there are a lot of lazy programmers out there is true. Anyone who has had to hire or manage programmers will confirm this. Too many developers don't bother learning enough of their craft to be considered actually competent. Faced with the need to specialize carefully, many simply give up and learn only enough to get by (and sometimes not even that much). They're content to learn the bare minimum needed to get hired. They'll learn enough of the "how" to create a program without ever bothering to learn any of the "why".

Teaching Others

I have a minor problem with Karl's explanation, though. He says, "I advocate against the use of DataSets as a counterbalance to people who blindly use them." While I understand this position, I'm not sure I can be said to appreciate it. It smacks a little of the "for your own good" school of learning; which works well enough in a parent-child or even teacher-student relationship. I'm not sure it works so well in public or general discourse.

It is hard to correct bad habits, particularly habits as widespread as DataSet misuse seems to be. As one who often has the bad habits to be corrected, though, I think that I'd prefer having the problem explained and given the context so I can understand the trade-offs being made. That would give me the opportunity to know why something is wrong, not just that something is wrong.

That'd require discussing DataSets in specific instead of general terms. I'm not sure if Karl would really want to do that, though. I mean, his specialty at CodeBetter is really ASP.Net. Expecting him to tackle ADO.Net is not just unrealistic, it could have the effect of diluting his blog posts and alienating his regular readers or getting him embroiled in things he's less interested in.

I would like to see someone respectable and wider-read than I am take on Strongly-typed DataSets in a more complete fashion, though.

Professor Microsoft

Which is why I have to agree with Karl that the blame for DataSet misuse lies squarely in Microsoft's court. I stopped counting how many official articles and examples from Microsoft included egregious misuse or abuse of DataSets. And I have yet to see any that describe how to do it right or what kinds of things to look for in determining the trade-offs between a Strongly-typed DataSet and a more formal OR/M solution, let alone ameliorating factors for each. The only articles about DataSets that I can remember that don't actually teach bad habits are articles about how bad they are. Which isn't helpful. It'd be nice to have something, somewhere that talks about using them wisely and what their strengths actually are. Maybe that should be a future blog post here...

26. February 2007 18:33 by Jacob | Comments (0) | Permalink

Are We There Yet?

"So when will you be done with this development project?"

I don't know about you, but I hate this question. There simply is no good answer for it. It seems like such a simple question with a simple DateTime valued answer. One of these days I swear I'll answer with, "Oh, I'll be done next Tuesday at 2:34pm." just to see what happens.

And seriously, businesses hate that we have such difficulty answering the question. It seems perfectly reasonable for them to want to know when they can plan to have the new processes that they know they desperately need. Developers demand high salaries and are ostensibly professionals, they should be able to give a professional answer, right?

The Road is Well Paved

The thing is, software development is a lot harder than people expect it to be--and this includes software professionals. Even simple software projects can run afoul of hidden complexities that can destroy well meaning estimates and make everyone unhappy. And no matter how you hedge your answers, people simply don't remember all your caveats, maybes, and what ifs that you use to indicate uncertainty.

The end result is that developers seldom make their ship-by dates and companies become disillusioned and impatient with all software development. That's not helpful for anybody, but it's pretty much the rule anymore.

And the fact of the matter is that the vast majority of developers (and development managers) never learn how to answer the estimate question. They'll move from company to company, repeating the cycle of hope, suspicion, and disappointment over and over again. Which works well enough for the developers in the boom times when the demand for development is so high that mildly talented house plants can get hired as developers.

So a lot of people are making the same mistakes over and over. Businesses can be excused for assuming that this is simply the way things are and feel confident in their distrust of software professionals. They've been there, done that, bought the t-shirt.

Paying the Toll

This environment causes developers who care about these kinds of things a lot of heartburn. Everyone pays for the ongoing cycle of disillusionment. I believe that this is what really prompts posts like the recent ones from Ted Neward talking about professional ethics. And I've been known to throw my own hat into the ring as well.

We get tired of paying for the sins of those who have gone before. And I'm not referring to the messed up legacy code we stumble into, either. Frankly, messed up code is the least of your problems coming into a situation with a client who has been burned by previous developer promises. Companies that have had deadline after deadline missed have a degree of mistrust that is very hard to overcome.

We pay for this distrust in a hundred different ways. The thing is, trust is a paying commodity in business. Working with partners you trust means a whole lot of overhead you can simply skip. An analogy: if I trust a plumber to fix my sink quickly and professionally, I can go get a burger and leave him to it. It's only when I don't have that trust that I have to pay the additional overhead of having someone I do trust watching to make sure he's not napping under the sink.

Want to see a business manager go into a dreamy fantasy? Ask them what it'd be like to be able to trust their software developers (in house or not). The more experience they've had with developers the more intense the fantasy.

The Rubber Meets the Road

We have a couple of areas of friction in businesses that exacerbate this situation. The main disconnect with business managers is that we have borrowed terminology and tools from other disciplines without understanding that our processes are fundamentally different. It's tricky because the temptation to use manufacturing terminology is immense. After all, we are creating a product of sorts. This makes so much sense on an intuitive level that it's hard to realize that the comparison is misleading and potentially dangerous.

I wish we could retrain everyone to make analogies to other business specialties. Scientific research or law come to mind as potentially useful analogies because both are similarly plagued by the impact of unique situations, changing ground rules, and unforeseen complexities. It would be interesting to investigate how managing software development like a patent application or drug research would change how we look at the problems involved. We might have stumbled onto iterative cycles and responding to altered requirements a whole lot sooner, for example.

Paying Attention

The real problem, though, is that most developers (and even most development managers) don't take the time to learn about common friction points. Nor do they take the time to build relations with their business counterparts so that you have some political capital (aka trust) to use when it is needed. It's easy to forget that much of the progress in software development practices are pretty recent in terms of business processes. After all, business managers don't move at the speed of light and changes tend to take time to penetrate those layers.

Which means that a whole lot of industry advances aren't even theory yet in the board room.

And the fact of the matter is that you cannot expect a business manager to understand what makes Agile practices work. Or the reason that strong unit testing saves time over the long run even though it takes more time up front. Learning to communicate at a level that is sufficiently detailed for smart business decisions without getting bogged down into the jargon inherent in any specialty is an invaluable skill, and one best learned earlier than later. That means thoroughly understanding those theories yourself--not just on the surface or in buzzword compliance. It also means learning to communicate that understanding from orbit, 30,000 ft, 5,000 ft, and right on the ground. This is hard to do. It takes practice. It also takes exposure to business manager types. I'm not sure which is harder...

Something to think about, though: not learning this skill leaves you at the mercy of those who do learn it.

My point, though, is that it takes both. You have to learn your profession so thoroughly that you can deconstruct its "best practices" ("design patterns", whatever) and rebuild them from basic principles on the fly. AND you have to learn to communicate that understanding comfortably to people of varying familiarity with software development in a business environment.

That's what it takes to be a true professional. It's easy to let those two skills fall out of balance. Individuals who understand both are invaluable to a company. Also rare. Companies who discover someone capable of both are often surprised at how much smoother things run with that person placed where they can do the most good--a point Jeff Atwood's latest on becoming a better programmer drives home.

So I don't have a formula for quick and accurate estimates. Just a lot of hard work. Still, here's a tip for free: anyone asking for a firm delivery date is inherently assuming BDUF. Once you know that, you know where to start your answer.

29. January 2007 18:19 by Jacob | Comments (4) | Permalink


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