@andyfleener

Humanist, Systems Thinker, Safety Nerd, Senior Director of Engineering @totalexpertinc, Devopsdays MSP Organizer, Chaos Engineering Book Contributor, he/him

 Minneapolis, MN
hachyderm.io/@andyfleener
Joined June 2008
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Suspending my twitter break just to announce a new blog post: surfingcomplexity.blog/2022/…

Southwest airlines: a case study in brittleness

What happens to a complex system when it gets pushed just past its limits? In some cases, the system in question is able to actually change its limits, so it can handle the new stressors that get t…

surfingcomplexity.blog
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Andy Fleener retweeted
Nora Jones
@nora_js27 Nov 2022
.@LFISoftware Newsletter — Issue #1 mailchi.mp/45080001a51c/lear…

Learning from Incidents Newsletter - Issue #1

Announcing the Learning from Incidents conference

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Hey, tap-tap🎙️...we're back. Well, we never left, but we've been busy outside of Twitter (how's Twitter going these days?) We have our first ever conference coming up this February. Are you doing interesting things with incidents? We want to hear from you register.learningfrominciden…
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Wooo, the CFP for the first @LFISoftware (Learning from Incidents) conference is now up! web.cvent.com/event/e3af0a43…
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Sounds like Twitter’s going to provide us with an object lesson in Rasmussen’s safety model. If you’re cutting costs and people are burning out, the system gets pushed towards the safety boundary. Outages coming?
Lorin Hochstein@norootcause3 Feb 2022
Here’s a doodle of Jens Rasmussen’s dynamic safety model. * Bankrupt - boundary to economic failure * Burnout - boundary to unacceptable workload * BOOM! - boundary of fundamentally acceptable performance
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"Prescriptive engineering is not enough. As surprises emerge, we need to spot them, understand them, and explain them. We need to practice descriptive engineering." (~1000w) blog.danslimmon.com/2022/10/…
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Andy Fleener retweeted
Chad Todd@ctoddkicker129 Sep 2022
Here is a great resource to start with for Resilience Engineering. whatisresilienceengineering.… credit for website: @ThaiWoodHere
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Welcome to Monday Folks! In today's concepts we are going to look at Common Ground and Coordination in Joint Activity. Paper (free to download): researchgate.net/publication… Video (free to view): youtube.com/watch?v=KgC_N9gl…
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a debugging manifesto
a debugging manifesto 1. inspect, don't squash try to fix the bug (crossed out) understand what happened (yes, smiley faces and stars) 2. check your assumptions person (thinking): "wait, how do I know that's true?" 3. being stuck is temporary person (thinking): "I will never figure this out!" ... 2 minutes later.... person (thinking): "well, I haven't tried X..." 4. don't go it alone person (speaking to other person): "hey, have you seen this problem before?" 5. trust nobody and nothing person (thinking): this library can't be buggy... OR CAN IT??? 6. there's always a reason computer: "computers are always logical, even when it doesn't feel that way" 7. build your toolkit person (holding toolkit): "wow, the CSS inspector makes debugging SO MUCH EASIER" 8. it can be an adventure person (talking, with cute bug next to them): "you wouldn't BELIEVE the weird bug I found" by @b0rk @omarieclaire, more like this at https://wizardzines.com

ALT a debugging manifesto 1. inspect, don't squash try to fix the bug (crossed out) understand what happened (yes, smiley faces and stars) 2. check your assumptions person (thinking): "wait, how do I know that's true?" 3. being stuck is temporary person (thinking): "I will never figure this out!" ... 2 minutes later.... person (thinking): "well, I haven't tried X..." 4. don't go it alone person (speaking to other person): "hey, have you seen this problem before?" 5. trust nobody and nothing person (thinking): this library can't be buggy... OR CAN IT??? 6. there's always a reason computer: "computers are always logical, even when it doesn't feel that way" 7. build your toolkit person (holding toolkit): "wow, the CSS inspector makes debugging SO MUCH EASIER" 8. it can be an adventure person (talking, with cute bug next to them): "you wouldn't BELIEVE the weird bug I found" by @b0rk @omarieclaire, more like this at https://wizardzines.com

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Hi friends! I'm looking for a new role. I'm especially interested in hearing from organizations that want to learn meaningful lessons from incidents. Checkout sysadvent.blogspot.com/2021/… let me know if you think we're a match!
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Replying to @norootcause
It’s also a great way to burn those folks out while accidentally bonding them together. Then, because they care about each other, they show up to incidents they’re not oncall for to cover gaps in process and staffing, quite literally obscuring broken systems with friendship.
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Why do we see such psychological resistance to removing non-actionable alerts? We see it over and over again.
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During an incident, we must make high-consequence decisions under time pressure, partial information, and uncertainty. The better incident write-ups document these challenges.
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"...the processes underpinning human error are the same as those which lead to desirable outcomes." – State of science: evolving perspectives on ‘human error’ by G.J.M. Read, @StevenShorrock , G.H. Walker, & P.M. Salmon tandfonline.com/doi/full/10.…
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Jack sparrow "you have heard of me" meme. Top panel: I don't understand how an org like this an work at all Bottom panel: But you do admit that it works

ALT Jack sparrow "you have heard of me" meme. Top panel: I don't understand how an org like this an work at all Bottom panel: But you do admit that it works

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People who liked this tweet also liked: Human Factors Cognitive Systems Engineering Resilience Engineering
Ray Myers@lambdapocalypse6 Aug 2022
Avoid implementing processes that rely on people remembering to follow them.
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Andy Fleener retweeted
Jessica Kerr
@jessitron9 Aug 2022
Reliability is about meeting expectations. Resilience is about outcomes, and getting there even when the expected methods don’t work.
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🗳Hey Minneapolis frens, remember there's a primary on Tuesday with early voting until then. If you want to see @IlhanMN on your ballot this fall, you need to vote for her now. And our useless mayor endorsed her entirely clown-shoes challenger. Read more: naomikritzer.com/2022/07/23/…

Primary Elections 2022: US House 05

The good news for me with this post is, I already kind of did the homework on this one back in February when Don Samuels first started exploring a run. On the Democratic primary ballot: Ilhan Omar …

naomikritzer.com
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The Open Space schedule for Day 2 is now up: tinyurl.com/2p99mxaf #devopsdays

devopsdays MSP 2022 Open Spaces

docs.google.com
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Iterating together requires caring about our interactions with each other.💕🌟@rukiaasm #DevOpsDays
Clear team agreements on a slide with Rukia on stage.

ALT Clear team agreements on a slide with Rukia on stage.

Rukia wears a black hijab, and a colorful skirt and skirt.

ALT Rukia wears a black hijab, and a colorful skirt and skirt.

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