"Working software is the primary measure of progress" is an enabling constraint. Sometimes, managers use the phrase as a club to get people coding. Coding, however, is a necessary driver of creating software, but it's not the only thing you have to do. 1/5

Standing in front of a whiteboard and discussing design, creating and running tests, just staring out the window and thinking, are all necessary parts of the development process; but if you don't get that software into your customers hands, you've accomplished nothing. 2/5
Using working software (the result of the process) as your measure of progress, puts natural limits on the entire process, including the staring-out-the-window parts. It forces you to work small (thus the "constraint") enough to deliver frequently. 3/5
I'll add that sometimes, progress does have to slow down so that you can think things through. That's fine. That's natural overhead in the process. Incorporate it into your planning. 4/5
But, if the overhead overtakes valuable work (creating "working software"), then you need to take a long hard look at how you're doing things. 5/5
I'll add: The underlying assumption is that "software" is *valuable* software. You need to take the phrase in the context of the rest of the Agile Manifesto. There's no value in just pushing random junk out the door. That's not progress.

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So we had to develop technologies like this to barely manage control over limited areas in Iraq's few urban centers. Only ~8 in 100 Iraqi adults owns a personal vehicle. That rate is > 1 car/adult in America yet I have never seen any doctrine paper or work of fiction address this


We've seen and struggled in civil conflicts with instant, local, universal, distributed communications (cell phone era, basically every conflict since 2000). We've seen and struggled in conflicts with instant, global, universal distributed communications (everything since 2011).

The world's most overfunded military and glow in the dark agencies struggle and largely fail to contain conflicts where fhe vast, vast majority of people are locked into a ~5mi radius of their home.

How can they possibly contain a conflict in a nation with universal car ownership and the most developed road network in the world? The average car can travel over 400 miles on one tank of gas, how can you contain the potential of that kind of mobility?

I think that's partially why the system was so freaked out by 1/6. Yes, most of it is histrionics but you don't decide to indefinitely turn your capital into the Baghdad Green Zone with fortifications and 25k troops over histrionics alone.
There has been a lot of discussion about negative emissions technologies (NETs) lately. While we need to be skeptical of assumed planetary-scale engineering and wary of moral hazard, we also need much greater RD&D funding to keep our options open. A quick thread: 1/10

Energy system models love NETs, particularly for very rapid mitigation scenarios like 1.5C (where the alternative is zero global emissions by 2040)! More problematically, they also like tons of NETs in 2C scenarios where NETs are less essential.
https://t.co/M3ACyD4cv7 2/10


In model world the math is simple: very rapid mitigation is expensive today, particularly once you get outside the power sector, and technological advancement may make later NETs cheaper than near-term mitigation after a point. 3/10

This is, of course, problematic if the aim is to ensure that particular targets (such as well-below 2C) are met; betting that a "backstop" technology that does not exist today at any meaningful scale will save the day is a hell of a moral hazard. 4/10

Many models go completely overboard with CCS, seeing a future resurgence of coal and a large part of global primary energy occurring with carbon capture. For example, here is what the MESSAGE SSP2-1.9 scenario shows: 5/10

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