Retrospective Coherence - What Does That Mean?
Glen Alleman MSSM
Vietnam Veteran, Applying Systems Engineering Principles, Processes & Practices to Increase the Probability of Program Success for Complex Systems in Aerospace & Defense, Enterprise IT, and Process and Safety Industries
Why is the past easier to predict than the future?
Retrospective Coherence?is looking back in time and creating a coherent narrative around what happened. The accuracy of this narrative is suspect because the narrative can only be based on assumptions of the motivations and methods of decision-making that happened in places where no one doing the analysis was present. I'll use aircraft accidents as the basis of my argument, but this argument applies to all domains of inquiry.
This is why commercial firms buy?errors and omissions?insurance. To protect the firm, its workers, and other professionals from claims of inadequate work or negligent actions. This is common in construction and consulting. Lloyds of London is a well-known provider of this type of liability protection.?
Some define Retrospective Coherence as a scientific process of interpreting the past.
Those making that claim must redefine the scientific process since there is no underlying?theory?for assessing the observations or experiments to test against.
Others define it as sensemaking.
Others define it as a pure fabrication to sell consulting services to business executives unaware of core management practices in the presence of uncertainties - both reducible and irreducible.
One definition of?Retrospective Coherence?is an attempt to provide a scientific approach to understanding previous events. With it, practitioners within the "knowledge community" are formalizing concepts that historically fit under the age-old idea of?"20 / 20 hindsight".
The problem with looking backward is that we always see the past through the biases of?now.?This is called?cognitive bias.?
And when doing this, we're laying the groundwork for failure to develop the correct understanding of the past and make informed decisions in the presence of uncertainty needed to increase the probability of success in the future. This approach is?post facto,?and of little use once the failure has occurred.?
Using Retrospective Coherence is an excuse for not doing the Root Cause Analysis and the?Pre-Mortem?Analysis needed to make informed decisions. Retrospective Coherence is an?after-the-fact?analysis of the crash.?This does little for those who died in the crash. The approach to aircraft flight safety is to?prevent?accidents. It only takes a little analysis to do that.?
We have a phrase in the military flight community from direct experience in the 101st Airborne Division, C/159th Assault Support Helicopter Battalion...
领英推荐
The Pilot is the First to Arrive at the Scene of the Accident
Along with this, we had another phrase.
This pre-mortem and root cause analysis (these are two sides of the same coin of Risk Management) is a proven approach to increasing the probability of success. Certain things are going to happen, and certain items are going to happen. This means you need to have a plan when things do happen. This?in-depth planning?is the basis of all high-reliability, high-integrity, fault-tolerant, fail-safe systems. Both physical, social, and soft systems. To suggest we only can deal with complex systems?after the fact?willfully ignores the principles and practices of Systems Engineering?
Start with?A Complexity Primer for Systems Engineers?to learn how
The conjectures of?soft solutions?and?fancy-worded non-actionable outcomes?proponents are post-facto providers. The airplane crash or the business crash - where were they in piloting the aircraft or business? Answer - standing on the sidelines selling consulting courses
I work in a?complex software-intensive system of systems?domain, which includes flight systems, launch vehicles, and power generation systems (nuclear and conventional). Everyone is given a book on the programs we work on -?Disasters and Accidents in Manned Spaceflight.?Along with?Normal Accidents: Living with High-Risk Technologies,?The Next Catastrophe: Reducing our Vulnerabilities to Natural, Industrial, and Terrorist Disasters, and?Failure is Not an Option.?
So when we hear about retrospective Coherence, the first question is: How Could What We Are Observing with the 20 /20- hindsight have been foreseen if we had asked, What Could Possibly Go Wrong?
The answer to that question starts with Root Cause Analysis and its companion?to Pre-Mortem Analysis. The first step in exploring this topic is to separate Social Systems from Engineered Systems. Yes, Engineered Systems have people involved in their creation and use. But those interactions are dramatically different from the social systems of?politics, societal interactions,?and?organizational complexity. There are lots of?philosophical writings?on this topic. But applying those to Increasing the Probability of Program and Project success has very little actionable process.
A Final Thought
When you hear the talk about retrospective Coherence and its biases and failures, search for the root cause of those failures. One root cause is poor leadership. I'm not talking about the?touchy-feely?type of leadership we encounter in our modern software development. I'm talking about the leadership found here in the books in my office that we put to work every day:
Enough of the theory of success from those who are self-proclaimed?professors?who are not practitioners?bending metal into money.
Seek instead advice and guidance from those?accountable?for spending other people's where?Failure is Not an Opinion.
CSEP Systems/Software Engineering - Improving the world through better systems
2 年Thanks for great advice and the links, Glen! A funny caricature is “Captain Hindsight” from #SouthPark (so watch it at your own risk!): https://youtu.be/xB6B1tMywgY