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July 1, 2020
Adapted from DevOps for the Modern Enterprise by Mirco Hering
To support you in adopting a multispeed future, here are two exercises for you to run in your organization. Both of them are highly related: the first is an analysis of your application portfolio and the second is the identification of a minimum viable cluster of application for which a capability uplift will provide real value.
If you are like most of my clients, you will have hundreds or thousands of applications in your IT portfolio. If you spread your change energy across all of those, you will likely see very little progress, and you might ask yourself whether the money is actually spent well for some of those applications. So, while we spoke about the IT delivery process in the Chapter 1 of DevOps for the Modern Enterprise exercises as one dimension, the application dimension is the second dimension that is important. Let’s look at how to categorize your application in a meaningful way.
Each organization will have different information available about its applications, but in general, an analysis across the following four dimensions can be done:
For each of the first three dimensions, you can either use absolute values (if you have them) or relative numbers representing a nominal scale to rank applications. For the technology stack, you can group them into priority order based on your technical experience with DevOps practices in those technologies. I recommend using a table with headings much like the one in the table below. On the basis of this information, you can create a ranking of importance by either formally creating a heuristic across the dimensions or by doing a manual sorting. It is not important for this to be precise; we are aiming only for accuracy here.
It’s clear that we wouldn’t spend much time, energy, and money on applications that are infrequently changed—applications that are not critical for our business and on which we don’t
intend to spend much money in the future. Unfortunately, just creating a ranking of applications is usually not sufficient, as the IT landscape of organizations is very complex and requires an additional level of analysis to resolve dependencies in the application architecture.
As discussed above, the minimum viable cluster is the subset of applications that you should focus on, as an uplift to these will speed up the delivery of the whole cluster. Follow the steps below to identify a minimum viable cluster:
Once you have successfully identified your minimum viable cluster, you are ready to begin the uplift process by implementing DevOps practices such as test automation and the adoption of cloud-based environments, or by moving to an Agile team delivering changes for this cluster.
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