March 12, 2017

Learn TDD with Codemanship

Why Products Don't Matter To Tech Investors, But Hype Does

They say 'you get what you measure', and in the world of tech start-ups this is especially true.

Having lived and worked through several tech bubbles, I've seen how the promise of winning mind-bogglingly big ("boggly"?) has totally skewed business models beyond the point where many tech start-ups are even recognisable as businesses.

The old notion of a business - where the aim is to make more money than you spend - seems hopelessly old-fashioned now. Get with it Granddad! It's not about profit any more, it's about share prices and exit strategies.

If your tech start-up looks valuable, then it's valuable. It matters not a jot that you might be losing money hand-over-fist. As long as investors believe it's worth a gazillion dollars, then it's worth a gazillion dollars.

For those of us who create the technologies that these start-ups are built on, this translates into a very distorted idea of what constitutes a 'successful product'. I have, alas, heard many founders state quite openly that it doesn't much matter if the technology really works, or if the underlying code has any long-term future, What matters is that, when it comes time to sell, someone buys it.

Ethically, this is very problematic. It's like a property developer saying 'it doesn't matter if the house is still standing 10 years from now, just as long as it's standing when someone buys it'.

Incredibly, very few tech start-up investors do any technical due diligence at all. Again, I suspect this is because you get what you measure. They're not buying it because it works, or because the technology has a future. They're buying it so that they, too, can sell it on for an inflated price. It could be a brick with "tech" painted on it, and - as long as the valuation keeps going up - they'll buy it.

You see, investors want returns. And that's pretty much all they want. They want returns from tech businesses. They don't care if the tech works, or if the business is viable in the long term. Just like they want returns from luxury waterside apartments that no ordinary person could afford to live in. They don't care if nobody lives in them, just as long as they keep going up in value.

Just like the property bubble, the tech bubble runs chiefly on hype. A £1,000,000 2-bed apartment is worth £1,000,000 because an estate agent or someone in a glossy colour supplement said so. An expectation of value is set. Similarly, Facebook is worth twelvety gazillions because the financial papers say it is. That is the expectation for tech start-ups. They can be valued at billions of dollars with a turnover of peanuts by comparison.

What makes tech businesses worth so much is their potential for expansion. Expanding your chain of coffeeshops requires you to overcome real physical barriers like finding premises and staff and buying more coffee machines and so on. Cost-wise, for a software business, there's not a huge difference in outlay between 1,000 users and 1,000,000 users. If only Costa could host their shops on the cloud!

Tech start-ups are just lottery tickets, where the jackpot can be truly astronomical. And what matters most in this equation is that the technology sounds good.

Exhibit A: the recent Articificial Intelligence bubble. News journalists have latched on to this idea - carefully crafted and lovingly packaged by tech industry PR - that real AI, the kind we saw in the movies, is just around the corner. What, again?

The true promise of AI has been 30 years away for the last 50 years. In reality, chatbot sales support sucks, websites designed by AI are crummy, and recommendations made by ad taregting engines are as asanine as they always were ("we see you bought a lawnmower; would you like to buy another lawnmower?") And as for self-driving cars...

But it doesn't matter that AI isn't as far advanced as they'd have us believe, just as long as we do believe it - for long enough to dip our hands in our pockets and buy some shares in the companies hyping it. And we'll do it, because there's a good chance those shares will go up in value and we'll be able to sell them for a profit. This is why few people are willing to say that the Emperor has no clothes. Too many own shares in the company that manufactured those clothes.

As a software developer, though, I struggle to find job satisfaction or to find any professional pride in making invisible clothes for silly Emperors. Yes, there are those of us - sadly, too plentiful - who'll apparently do anything as long as the money's right. But I'd like to think that's a different profession to the one I'm in.

March 6, 2017

Learn TDD with Codemanship

Start With A Goal. The Backlog Will Follow.

The little pairing project I'm doing with my 'apprentice' Will at the moment started with a useful reminder of just how powerful it can be to start development with goals, instead of asking for a list of features.

As usual, it was going to be some kind of community video library (it's always a community video library, when will you learn!!!), and - with my customer role-playing hat on - I envisaged the usual video library-ish features: borrowing videos, returning videos, donating videos, and so on.

But, at this point in my mentoring, I'm keen for Will to get some experience working in a wider perspective, so I insisted we started with a business goal.

I stipulated that the aim of the video library was to enable cash-strapped movie lovers to watch a different movie every day for a total cost of less than £100 a year. We fired up Excel and ran some numbers, and figured out that - in a group with similar tastes (e.g,, sci-fi, romantic comedies, etc) - you might need only 40 people to club together to achieve this.

This reframed the whole exercise. A movie club with 40 members could run their library out of a garden shed, using pencil and paper to keep basic records of who has what on loan. They could run an online poll to decide what titles to buy each month. They didn't really need software tools for managing their library.

The hard part, it seemed to us, would be finding people in your local area with similar tastes in movies. So the focus of our project shifted from managing a collection of DVDs to connecting with other movie lovers to form local clubs.

Out of that goal, a small feature list almost wrote itself. This is how planning should work; not with backlogs of feature requests, but with customers and developers closely collaborating to achieve goals.

It's similar in many ways to how TDD should work - in fact, arguably, it is TDD (except we start with business tests). When I'm showing teams how to do TDD, I advise them not to think of a design and then start writing unit tests for all the classes and methods and getters and setters they think they're gloing to need. Start with a customer test, and drive your internal design directly from that. Classes and methods and getters and setters will naturally emerge as and when they're needed.

When I run the Codemanship Agile Software Development workshop, we do it backwards to illustrate this point. Teams are tasked with coming up with internal designs, and then I ask them to write some customer tests afterwards. Inevitably, they realise their internal design isn't what they really needed. Stepping further back, I ask them to describe the business goals of their software, and at least half the teams realise they're building the wrong thing.

So, my advice... Ditch the backlog and start with a goal. The rest will follow.

February 2, 2017

Learn TDD with Codemanship

101 TDD Tips - #1-#80

We're now up to number 81 in my 101 TDD Tips series on Twitter, and I've pasted numbers 1-80 into a handy PDF for your convenience.

January 20, 2017

Learn TDD with Codemanship

TDD 2.0 - London, May 10th

After the success of last week's TDD 2.0 training workshop, I've immediately scheduled another one for the Spring.

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It's 3-days jam-packed with hands-on learning and practice, covering everything from TDD basics and customer-driven TDD/BDD, all the way to advanced topics other courses and books don't touch on like mutation testing and non-functional TDD.

And it comes with my new TDD book, exclusive to attendees.

If you fancy a code craft skills boost, twist the boss's arm and join us on May 10th.

January 18, 2017

Learn TDD with Codemanship

How Long Would Your Organisation Last Without Programmers?

A little straw poll I did recently on Twitter has proved to be especially timely after a visit to the accident & emergency ward at my local hospital (don't worry - I'm fine).

It struck me just how reliant hospitals have become on largely bespoke IT systems (that's "software" to me and you). From the moment you walk in to see the triage nurse, there's software - you're surrounded by it. The workflow of A&E is carefully controlled via a system they all access. There are computerised machines that take your blood pressure, monitor your heart, peer into your brain and build detailed 3D models, and access your patient records so they don't accidentally cut off the wrong leg.

From printing out prescriptions to writing notes to your family doctor, it all involves computers now.

What happens if all the software developers mysteriously disappeared overnight? There'd be nobody to fix urgent bugs. Would the show-stoppers literally stop the show?

I can certainly see how that would happen in, say, a bank. And I've worked in places where - without 24/7 bug-fixing support - they'd be completely incapable of processing their overnight orders, creating a massive and potentially un-shiftable backlog that could crush their business in a few weeks.

Ultimately, DR is all about coping in the short term, and getting business-as-usual (or some semblance of it) up and running as quickly as possible. It can delay, but not avoid, the effects of having nobody who can write or fix code.

And I'm aware that big organisations have "disaster recovery" plans. I've been privy to quite a few in my lofty position as Chief Technical Arguer in some very large businesses. But all the DR plans I've seen have never asked "what happens if there's nobody to fix it?"

Smart deployers, of course, can just roll back a bad release to the last one that worked, ensuring continuity... for a while. But I know business code: even when it's working, it's often riddled with unknown bugs, waiting to go off, like little business-killing landmines. I've fixed bugs in COBOL that were written in the 1960s.

Realistically, rolling back your systems by potentially decades is not an option. You probably don't even have access to that old code. Or, if you do, someone will have to re-type it all in from code listings kept in cupboards.

And even if you could revert your way back to a reliable system with potential longevity, without the ability to change and adapt those systems to meet future needs will soon start to eat away at your organisation from the inside.

It's food for thought.

January 14, 2017

Learn TDD with Codemanship

Codemanship Alumni - LinkedIn Group

Just a quick note to mention that there's a special LinkedIn group for folk who've attended Codemanship training workshops*.

With demand for skills like TDD and refactoring rising rapidly, membership is something you can display proudly for interested hirers.

* You'll need to list details of Codemanship training courses you've attended (what, when, where) on your LinkedIn profile so I can check against our training records.

January 9, 2017

Learn TDD with Codemanship

Last Call for TDD 2.0 - London, Wed-Fri

Just a quick note to mention I've got a bit of space of available for this week's jam-packed TDD 2.0 training workshop in London.

January can be a quiet period for dev teams, so twist the boss's arm and take advantage of some slow time.

December 28, 2016

Learn TDD with Codemanship

The Best Software Developers Know It's Not All 'Hacking'

A social media debate that appears to have been raging over the Xmas break was triggered by some tech CEO claiming that the "best developers" would be hacking over the holidays.

Putting aside just how laden with cultural assumptions that tweet was (and, to be fair, many of the angry responses to it), there is a wider question of what makes a software developer more effective.

Consider the same tweet but in a different context: the "best screenwriters" will spend their holiday "hacking" screenplays. There's an assumption there that writing is all there is to it. Look at what happens, though, when screenwriters become very successful. Their life experiences change. They tend to socialise with other movie people. They move out of their poky little downtown apartments and move into more luxurious surroundings. They exchange their beat-up old Nissan for a brand new Mercedes. They become totally immersed in the world of the movie business. And then we wonder why there are so many movies about screenwriters...

The best screenwriters start with great stories, and tell their stories in interesting and authentic voices. To write a compelling movie about firefighters, they need to spend a lot of time with firefighters, listening to their stories and internalising their way of telling them.

First and foremost, great software developers solve real problems. They spend time with people, listen to their stories, and create working solutions to their problems told in the end user's authentic voice.

What happens when developers withdraw from the outside world, and devote all of their time to "hacking" solutions, is the equivalent of the slew of unoriginal and unimaginative blockbuster special effects movies coming out of Hollywood in recent years. They're not really about anything except making money. They're cinema for cinema's sake. And rehashes of movies we've already seen, in one form or another. because the people who make them are immersed in their own world: movie making.

Ironically, if a screenwriter actually switched off their laptop and devoted Xmas to spending time with the folks, helping out with Xmas dinner, taking Grandma for a walk in her wheelchair, etc, they would probably get more good material out of not writing for a few days.

Being immersed in the real world of people and their problems is essential for a software developer. It's where the ideas come from, and if there's one thing that's in short supply in our industry, it's good ideas.

I've worked with VCs and sat through pitches, and they all have a Decline Of The Hollywood Machine feel to them. "It's like Uber meets Moonpig" is our equivalent of the kind of "It's like Iron-Man meets When Harry Met Sally" pitches studio executives have to endure.

As a coach, when I meet organisations and see how they create software, as wel as the usual technical advice about shortening feedback cycles and automating builds and deployment etc, increasingly I find myself urging teams to spend much more time with end users, seeing how the business works, listening to their stories, and internalising their voices.

As a result, many teams realise they've been solving the wrong problems and ultimately building the wrong software. The effect can be profound.

I'll end with a quick illustration: my apprentice and I are working on a simple exercise to build a community video library. As soon as we saw those words "video library", we immediately envisaged features for borrowing and returning videos, and that sort of library-esque thing.

But hang on a moment! When I articulated the goal of the video library - to allow people to watch a movie a day for just 25p per movie - and we broke that down into a business model where 40+ people in the same local area who like the same genres of movies club together - it became apparent that what was really needed was a way for these people to find each other and form clubs.

Our business model (25p to watch one movie) precluded the possibility of using the mail to send and return DVDs. So these people would have to be local to wherever the movies were kept. That could just be a shed in someone's garden. No real need for a sophistated computer system to make titles. They would just need some shelves, and maybe a book to log loans and returns.

So the features we finally came up with had nothing to do with lending and returning DVDs, but was instead about forming local movie clubs.

I doubt we'd have come to that realisation without first articulating the problem. It's not rocket science. But still, too few teams approach development in this way.

So, instead of the "It's like GitHub, but for cats" ideas that start from a solution, take some time out to live in the real world, and keep your eyes and ears open for when someone says "You know what's really annoys me?", because an idea for the Next Big Thing might follow.

December 21, 2016

Learn TDD with Codemanship

"Our Developers Don't Do Any Design". Yes They Do. They Have To.

A complaint I hear often from managers about their development teams is "they don't do any design".

This is a nonsense, of course. Designedness - is that a word? It is now - is a spectrum, with complete randomness at one end and zero randomness at the other. i.e., completely unintentional vs. nothing unintentional.

Working code is very much towards the zero randomness end of the spectrum. Code with no design wouldn't even compile, let alone kind of sort of work.

To look at it another way, working code is a tiny, tiny subset of possible combinations of alphanumeric characters. The probability of accidentally stumbling on a sequence of random characters that makes working code is so vanishingly remote, we can dismiss it as obvious silliness.

Arguably, software design is a process of iteratively whittling down the possibilities until we arrive at something that ticks the right boxes, of which there will be so very many if the resulting software is to do what the customer wants.

It's clear, though, that this tiny set of possible working code configurations contains more than one choice. And when you say "they don't do any design", what you really mean is "I don't like the design that they've chosen". They've done lots and lots of design, making hundreds and thousands (and possibly millions) of design choices. You would just prefer they made different design choices.

In which case, you need to more clearly define the properties of this tiny subset that would satisfy your criteria. Should they require modules in their design to be more loosely coupled, for example? If so, then add that to the list of requirements; the tests their design needs to pass.

Finally, in some cases, when managers claim their development teams "don't do any design", what they really mean is they don't follow a prescribed design process, producing the requisite artefacts as proof that design was done.

The finished product is the ultimate design artefact. If you want to know what they built, look at the code. The design is in there. And if you can't understand the code, maybe you should let someone who can worry about design.

December 19, 2016

Learn TDD with Codemanship

Start The New Year With A TDD Skills Boost

Just a quick reminder about the next public TDD training workshop I'm running in London on Jan 11-13. It's the most hands-on and practical workshop I've ever done, and at about half the price of the competition, it's great value. And, of course, you get the exclusive TDD book. Not available in any shops!

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