The devops handbook how to Create World-Class Agility, Reliability, & Security in Technology Organizations By Gene Kim, Jez Humble, Patrick Debois, and John Willis

blameless post-mortems
, not 
to punish anyone, but to better understand what caused the accident and how 
to prevent it. This ritual reinforces our culture of learning. We also hold internal 
technology conferences to elevate our skills and ensure that everyone is always 
teaching and learning.
Because we care about quality, we even inject faults into our production en-
vironment so we can learn how our system fails in a planned manner. We 
conduct planned exercises to practice large-scale failures, randomly kill 
processes and compute servers in production, and inject network latencies 
and other nefarious acts to ensure we grow ever more resilient. By doing 
this, we enable better resilience, as well as organizational learning and 
improvement.
In this world, everyone has ownership in their work, regardless of their role in 
the technology organization They have confidence that their work matters and 
is meaningfully contributing to organizational goals, proven by their low-stress 
work environment and their organization’s success in the marketplace. Their 
proof is that the organization is indeed winning in the marketplace.
THE BUSINESS VALUE OF DEVOPS
We have decisive evidence of the business value of DevOps. From 2013 through 
2016, as part of Puppet Labs’ 
State Of DevOps Report,
to which authors Jez 
Humble and Gene Kim contributed, we collected data from over twenty-five 
thousand technology professionals, with the goal of better understanding
the health and habits of organizations at all stages of DevOps adoption.
The first surprise this data revealed was how much high performing organi-
zations using DevOps practices were outperforming their non–high performing 
peers in the following areas:
• 
Throughput metrics
• 
Code and change deployments (thirty times more frequent)