Software architect mistakes

I think that to get up in the morning and brew a good cup of coffee is one of the best way to start the day. You know, the heady fragrance that emanates from the machine-pot, itís delicious. When itís ready, pour the coffee into a cup, add some sugar, and finally you got it – end of the coffee making process.

Have you ever thought to design a coffee making process with some diagrams, or doing the same with other banal activities such as taking a shower? Of course not.
For other cases less trivial than these, including software project development, a minimal-design work can be quite useful and somewhat needed.
Often questions arise; is an architecture design worth the time and effort invested in it? Well, you may answer this question first: Are there risks in the project that could be minimized by an early design activity?

The more ambitious and challenging the project is, the higher the number of risks, and the more difficult it is to complete successfully.

How to identifying risks. The easiest place to start is with requirements, in whatever form they take, and to look for things that seem difficult to achieve.
Gathering requirements is fundamental for deciding what to do and how. However, sometimes problems arise at this starting point that lead to the ruination of the project. Some assumptions may underestimate this key phase and shake the architect role to its foundations:

1. Itís someone elseí responsibility to do requirements.

Domains drive the architecture choices, not vice-versa. Requirements can create architecture problems. At the very least, you need to assist the business analysts.

2. I learn the domain as I write the code; incrementally.

While prototyping pieces of software is a way for mitigating engineering risks and figuring out the hardest problems, writing code could be a waste of time for analyzing a domain. Rather, itís very cost-effective to modelling it in advance.

3. The requirements are already fully understood by the stakeholders.

Clear communication is critical between people and the role of a software architect can be a very difficult one when others donít understand what you do and why.

4. Domains are irrelevant to architecture choice.

Developers may copy an architecture from a past project. Maybe just following the company standard, but ignoring the motivations behind previous choices. They are more likely to be unaware of the qualities required in the current project.

5. I already know the requirements.

At least the documentation should be in your mind, but designers should use models to amplifying their reasoning abilities and unfold not clearly visible aspects that affect their own risks.


Walzing with the Tech crunch

The economic crisis we’re currently going through is teaching some lessons to the Western countries, in particular to the Anglo-Saxons, that our grandparents know pretty much, although it seems we’ve forgotten the past years in this †financial bubble. The debt has several pros: allows building, buying, investing and, when properly managed, might ensure a safe return and a fair growth of the economy. However, the debt has an outstanding bad side: it must be paid back. †It might be postponed, rolled over, shifted to other (more or less conscious) subjects, and its dreadful effects would be identified as bankrupt, credit-crunch, real estate bubble and recession.

With a view to the software applications, a similar observation might be rightful in terms of ‘state of health’, which point to a family of properties that the software should have to be easy changeable, so it could respond quickly to the requirements evolution.†A software that doesn’t enjoy good health is the one that has become fossilised to the original architecture, keeping it as is as possible, never revisited in the light of technological innovations and functional updates, but just patched with improvised and unconvincing surgery.

It’s suffering what it could be defined as inability to bear the debt built up over time, but in this case we’re not dealing with financial debt, this is the technical debt. Even though the term ‘technical debt’ sounds strange, it’s related to the financial fellow in many ways, and it is widespread in software development. The saying according to which economy is based on credit (debt) finds support also in the software world.

consultants at workDevelopers who are reading know well what I am talking about. You’re assigned to work in such XYZ firm from next Monday for at least 3 months, and when you’ll start this new task you’ll be instructed about what to do.

The workout mainly consists of implementing new features on top of the customer’s solid rock application, a very remarkable system built some years ago for serving peculiar needs.

So far, it has worked well, the owners said, you may just make it worse than it is now. Later on, you have no choice but to agree with them.

Expanding or changing the set of features without re-factoring looks like seeding a crop without ploughing the land before, if the system’s authors didn’t predict such an amendment. The harvest could be lost, couldn’t it?

You’ll be asked to complete your job updating the old system and keeping the structure as it is, avoiding to break the fragile balance among components.†

Just for you information, consultants were called few months ago for a similar task. They added such a mess into the code that you have to spend most of your time to figure out what they wanted to do than working effectively on new things. Maybe the customer were disappointed by their way to conduct the development and now it’s your turn.

Thus, in addition to the new enhancements, you should fix what your precursors did.†

This subject is hard to handle and quite unpleasant in particular when the customer doesn’t want to hear talking about re-factoring unless it doesn’t delay the delivery, which is almost impossible, so the scheduled task proceeds as expected.

In short, it looks like going for a walk over the broken glasses swearing you won’t be injured.

Using the post’s subject, it looks like getting into debt again for covering the old one, just for adding short term solutions when too many of these have been applied in the past.

Looking back at the past, I’m realising how this kind of intervention is predominant on the amount of works done, that I don’t know how much time I would have to wait unemployed if I wanted to work only into brand new projects…

Sometimes I’d define myself as a debt collector, and I find it uncomfortable as a lawyer or a doctor would feel against a criminal prosecution or a rescue surgery: it’s an exploitation of other’s misfortunes. It might be painful, but we make the customer feel better.