Skip to main content

Heuristics for Working: Exploring


For a while now I've been collecting fieldstones on the topic of heuristics for working. Some of these are things that I've said to others, some of them are things that I've thought about when considering some aspect of myself or how I work, and others have come from books I've read, talks I've attended, and workshops I've participated in.

I've made a handful of rough categorisations and I'll put each set in a post under the tag Heuristics for Working.

But what do even I mean by heuristics for working? Good question. I mean rules of thumb for situations that arise in the workplace. They are bits of advice that can be useful to consider but don't offer any guarantees and will not always apply.

The collection is surely idiosyncratic, context-sensitive and perhaps too specific and too general in turn. Welcome to my head. I haven't sat down and tried to elaborate or enumerate more, or to try to fill the gaps. Everything here has arisen and been noted in the moment, although a good chunk of it is stuff that I've thought about in the past too.

Of course, having heuristics doesn't mean that I remember to use them, or pick a reasonable one when I do remember, or make a good choice when I have remembered and picked a reasonable one. That's part of the rich tapestry, isn't it? At least externalising them and listing them gives me an opportunity to try to understand and maybe change the way I work, the way I am biased, or the way I want to be.

Along the way, I got to wondering if there's one overriding heuristic, one heuristic to rule them all, a meta heuristic. If there was, I think it might run along these lines:
Question your heuristics.
I hope there's something interesting and perhaps even helpful here for you.

--00--

If you're short of ideas, make a change that you haven't made before and observe the outcome.

If you're short of ideas, ask someone.

If you're short of ideas, stop and summarise.

Externalise the summary to yourself, or someone else.

Ideas spawn ideas.

Give yourself choices.

Use the rule of three.

Make a list; as a creative thinking tool as well as an information store.

State the mission before you start, even if only to yourself.

If you have no mission, make the mission be "find the mission".

Look for related concepts.

Look for connections.

Think about your experiments in terms of comparisons.

What comparisons can you make to start you off if you're stuck, or to help you narrow down if you're diagnosing?

What comparisons make sense now? Why?

What's the smallest difference you can expose that you think might be significant?

Ask: what would make this wrong? How can that be discovered?

Remember not to simply confirm; look for an inverse or negative case.

Look for a non-side-effected case. (What could the side-effects be if this was the case?)

Get as close to the cause as possible.

Disprefer second-hand evidence.

Time-box, and then step back.

Time-box, and then dive in.

Time-box, and then do something else for a while.

Remember to consider both depth and breadth.

Ask whether now might be a time to go lateral.

Ask whether now might be a time to seek help.

Ask whether now might be a time to break the task down.

Ask whether now might be a time to pull in some other factors.

You can explore without having an expectation about the result.

Identify the variables.

Try to model the variables.

Frame experiments in which you deliberately hold nominated variables constant while varying others.

Vary fewer variables for more precise experiments. Vary more variables for big-picture data.

Ask how the variables can vary.

If they cannot vary, they are not variables or you don't understand them yet.

Ask how the variables are related.

What is this analogous to? Have I done something similar to this before? Can I reuse some or all of that?

Look for places to collect evidence from.

And set them up collecting evidence before you start experimenting.

Look for ways to harvest the pieces of evidence you know you are after efficiently.

But harvest other stuff that you don't yet know is useful too.

Find ways to be alerted when an interesting event has happened or, better, is happening.

Start in different ways: verbal, visual, mathematical.

Start in different ways: feelings, logic, random.

Start in different ways: the end, the middle, meta.

Image: https://flic.kr/p/axTAYb

Comments

Popular posts from this blog

Meet Me Halfway?

  The Association for Software Testing is crowd-sourcing a book,  Navigating the World as a Context-Driven Tester , which aims to provide  responses to common questions and statements about testing from a  context-driven perspective . It's being edited by  Lee Hawkins  who is  posing questions on  Twitter ,   LinkedIn , Mastodon , Slack , and the AST  mailing list  and then collating the replies, focusing on practice over theory. I've decided to  contribute  by answering briefly, and without a lot of editing or crafting, by imagining that I'm speaking to someone in software development who's acting in good faith, cares about their work and mine, but doesn't have much visibility of what testing can be. Perhaps you'd like to join me?   --00-- "Stop answering my questions with questions." Sure, I can do that. In return, please stop asking me questions so open to interpretation that any answ...

Can Code, Can't Code, Is Useful

The Association for Software Testing is crowd-sourcing a book,  Navigating the World as a Context-Driven Tester , which aims to provide  responses to common questions and statements about testing from a  context-driven perspective . It's being edited by  Lee Hawkins  who is  posing questions on  Twitter ,   LinkedIn , Mastodon , Slack , and the AST  mailing list  and then collating the replies, focusing on practice over theory. I've decided to  contribute  by answering briefly, and without a lot of editing or crafting, by imagining that I'm speaking to someone in software development who's acting in good faith, cares about their work and mine, but doesn't have much visibility of what testing can be. Perhaps you'd like to join me?   --00-- "If testers can’t code, they’re of no use to us" My first reaction is to wonder what you expect from your testers. I am immediately interested ...

The Best Programmer Dan Knows

  I was pairing with my friend Vernon at work last week, on a tool I've been developing. He was smiling broadly as I talked him through what I'd done because we've been here before. The tool facilitates a task that's time-consuming, inefficient, error-prone, tiresome, and important to get right. Vern knows that those kinds of factors trigger me to change or build something, and that's why he was struggling not to laugh out loud. He held himself together and asked a bunch of sensible questions about the need, the desired outcome, and the approach I'd taken. Then he mentioned a talk by Daniel Terhorst-North, called The Best Programmer I Know, and said that much of it paralleled what he sees me doing. It was my turn to laugh then, because I am not a good programmer, and I thought he knew that already. What I do accept, though, is that I am focussed on the value that programs can give, and getting some of that value as early as possible. He sent me a link to the ta...

Beginning Sketchnoting

In September 2017 I attended  Ian Johnson 's visual note-taking workshop at  DDD East Anglia . For the rest of the day I made sketchnotes, including during Karo Stoltzenburg 's talk on exploratory testing for developers  (sketch below), and since then I've been doing it on a regular basis. Karo recently asked whether I'd do a Team Eating (the Linguamatics brown bag lunch thing) on sketchnoting. I did, and this post captures some of what I said. Beginning sketchnoting, then. There's two sides to that: I still regard myself as a beginner at it, and today I'll give you some encouragement and some tips based on my experience, to begin sketchnoting for yourselves. I spend an enormous amount of time in situations where I find it helpful to take notes: testing, talking to colleagues about a problem, reading, 1-1 meetings, project meetings, workshops, conferences, and, and, and, and I could go on. I've long been interested in the approaches I've evol...

Not Strictly for the Birds

  One of my chores takes me outside early in the morning and, if I time it right, I get to hear a charming chorus of birdsong from the trees in the gardens down our road, a relaxing layered soundscape of tuneful calls, chatter, and chirrupping. Interestingly, although I can tell from the number and variety of trills that there must be a large number of birds around, they are tricky to spot. I have found that by staring loosely at something, such as the silhouette of a tree's crown against the slowly brightening sky, I see more birds out of the corner of my eye than if I scan to look for them. The reason seems to be that my peripheral vision picks up movement against the wider background that direct inspection can miss. An optometrist I am not, but I do find myself staring at data a great deal, seeking relationships, patterns, or gaps. I idly wondered whether, if I filled my visual field with data, I might be able to exploit my peripheral vision in that quest. I have a wide monito...

ChatGPTesters

The Association for Software Testing is crowd-sourcing a book,  Navigating the World as a Context-Driven Tester , which aims to provide  responses to common questions and statements about testing from a  context-driven perspective . It's being edited by  Lee Hawkins  who is  posing questions on  Twitter ,   LinkedIn , Mastodon , Slack , and the AST  mailing list  and then collating the replies, focusing on practice over theory. I've decided to  contribute  by answering briefly, and without a lot of editing or crafting, by imagining that I'm speaking to someone in software development who's acting in good faith, cares about their work and mine, but doesn't have much visibility of what testing can be. Perhaps you'd like to join me?   --00--  "Why don’t we replace the testers with AI?" We have a good relationship so I feel safe telling you that my instinctive reaction, as a member of the T...

Vanilla Flavour Testing

I have been pairing with a new developer colleague recently. In our last session he asked me "is this normal testing?" saying that he'd never seen anything like it anywhere else that he'd worked. We finished the task we were on and then chatted about his question for a few minutes. This is a short summary of what I said. I would describe myself as context-driven . I don't take the same approach to testing every time, except in a meta way. I try to understand the important questions, who they are important to, and what the constraints on the work are. With that knowledge I look for productive, pragmatic, ways to explore whatever we're looking at to uncover valuable information or find a way to move on. I write test notes as I work in a format that I have found to be useful to me, colleagues, and stakeholders. For me, the notes should clearly state the mission and give a tl;dr summary of the findings and I like them to be public while I'm working not just w...

Build Quality

  The Association for Software Testing is crowd-sourcing a book,  Navigating the World as a Context-Driven Tester , which aims to provide  responses to common questions and statements about testing from a  context-driven perspective . It's being edited by  Lee Hawkins  who is  posing questions on  Twitter ,   LinkedIn , Mastodon , Slack , and the AST  mailing list  and then collating the replies, focusing on practice over theory. I've decided to  contribute  by answering briefly, and without a lot of editing or crafting, by imagining that I'm speaking to someone in software development who's acting in good faith, cares about their work and mine, but doesn't have much visibility of what testing can be. Perhaps you'd like to join me?   --00-- "When the build is green, the product is of sufficient quality to release" An interesting take, and one I wouldn't agree with in gener...

Postman Curlections

My team has been building a new service over the last few months. Until recently all the data it needs has been ingested at startup and our focus has been on the logic that processes the data, architecture, and infrastructure. This week we introduced a couple of new endpoints that enable the creation (through an HTTP POST) and update (PUT) of the fundamental data type (we call it a definition ) that the service operates on. I picked up the task of smoke testing the first implementations. I started out by asking the system under test to show me what it can do by using Postman to submit requests and inspecting the results. It was the kinds of things you'd imagine, including: submit some definitions (of various structure, size, intent, name, identifiers, etc) resubmit the same definitions (identical, sharing keys, with variations, etc) retrieve the submitted definitions (using whatever endpoints exist to show some view of them) compare definitions I submitted fro...

Express, Listen, and Field

Last weekend I participated in the LLandegfan Exploratory Workshop on Testing (LLEWT) 2024, a peer conference in a small parish hall on Anglesey, north Wales. The topic was communication and I shared my sketchnotes and a mind map from the day a few days ago. This post summarises my experience report.  Express, Listen, and Field Just about the most hands-on, practical, and valuable training I have ever done was on assertiveness with a local Cambridge coach, Laura Dain . In it she introduced Express, Listen, and Field (ELF), distilled from her experience across many years in the women’s movement, business, and academia.  ELF: say your key message clearly and calmly, actively listen to the response, and then focus only on what is relevant to your needs. I blogged a little about it back in 2017 and I've been using it ever since. Assertiveness In a previous role, I was the manager of a test team and organised training for the whole ...