10 top tips to achieve Technology Cutover Success

by Andy Smith, on 09/06/18 19:24


For over a decade at ICEFLO, we have built our business by upgrading legacy technology on behalf of our clients. We've been involved in countless cutovers and have used this hands-on experience to design and build ICEFLO, our solution to help you plan and orchestrate your own technology cutover.

We believe that ICEFLO dramatically increases your chance of success but we know that it takes much more than a great collaboration platform to deliver the most demanding of cutovers. 

In this blog, we've pulled together a collection of opinions and ideas that we hope will help you design your own solution and cutover successfully. 

1. Get yourself organised ... and quickly

Organised Team New Every large cutover involves multiple organisations, including 3rd parties, each with their own “ways of working”. 

One of the first actions is to define a single, "virtual organisation" to bring all these moving parts together.

  • Define your Cutover organisation, with clear roles and responsibilities
  • Adopt common tools, standards, process and vocabulary to foster an effective, team-based approach
  • Define the big-picture early and bring parties on-board in phases
  • Invite everyone to align behind this model and leave their baggage at the door

2. Automate Audit 

Audit Concept NewKnowing exactly what you have in your Production estate is going to be an ongoing challenge. Don't convince yourself it won't change. One of the few certainties in this context is that it will. 


  • Manual, one-shot audits will be out of date before the ink is dry on the printed inventory 
  • Automation of audit, data analytics and exception management by repeated audits are essential

3. Embrace change and incorporate positive transformation

Embrace Change NewThe world won't stop rotating on its axis until cutover day arrives.

It's easier to surf a wave than to stand on top of it - so embrace change and look for opportunities to improve the end-state "target".

Here are some pointers on how to embrace and manage the changing environment:

  • Don't try to lock down change in Production but add a process step to track and manage it, replicating in the Target as part of each Production change
  • Resist the "conservatives" who shout out "lock it all down, accept no change, must be like-for-like" (these guys typically haven't done a change of this magnitude before)
  • Accept a delta between Source and Target where the business case for doing so is sensible and leaves a better end solution e.g. don't bake in a legacy solution based on the "no change mantra".
  • Exploit opportunities to build a better solution on the basis that large-scale technology cutovers are themselves digital transformation events
  • Include appropriate Cloud targets as a viable solution to sit alongside the Target Infrastructure of your own datacentre

4. Shut-down and Start-up Efficiency 

Startup Clock NewTime is the most precious commodity during a cutover event. Smooth, problem-free shut-downs and start-ups of business services/applications are perhaps the critical success factor for your cutover.


  • Start by documenting the detail - really detailed detail !
  • Dependencies, scheduled jobs and interfaces are critical - and often missed
  • Automate as much of this as possible - to reduce execution duration, error rates and the inevitable dependency on key people in your organisation and 3rd parties
  • Be sceptical when told "it's all documented and we do this all the time" - demand evidence in the form of documented procedures, with actual timings, from staff & 3rd parties
  • Remain sceptical even with documentation until this is all proven, at scale, during "exam conditions" in the form of rehearsals 

5. Protect Production 

Production Source NewTransactions must never, ever, ever flow from your target platform back into your Production source.

This represents the biggest risk to any Cutover programme

  • Design and implement a "one-way data valve" so that data can never flow from Target to Source (i.e. Production) environments
  • This is best implemented at the network and infrastructure layer, not the application or messaging layer.
  • Put this protection in place and validate it ... before the first rehearsal and before the first "Early" cutover

6. Embrace "Earlies"

Flexible NewUse "Earlies" to constantly seek opportunities to minimise the scope of cutover day.

Think about what chunks of this elephant you can get behind you - one bite at a time.


  • "Earlies" should create continuously used Production services, delivered earlier than the main cutover event
  • More "Earlies" = less scope in cutover = higher confidence
  • Reduced scope = lower complexity and less to do in limited time = lower risk

7. End User Access Management

Permissions NewAuthentication and permissions management will be a challenge.

"Errors of omission" will consume huge amount of time during cutovers.


  • Audit and Compliance is critical but repeating BAU processes will kill turnaround times
  • A technology cutover is anything but a BAU scenario - accept this fact early and react accordingly i.e. very pragmatically
  • Put together policies, procedures and people as a transient EUAM solution for both rehearsals and the cutover

8. Rehearse, rehearse & rehearse again

Rehearse NewCutovers are like an orchestra performing at the Oscars. For a slick and successful  performance, practice makes perfect. Days, weeks, months, even years of practice. 

Rehearsal is risk management. Period.

  • Rehearsals represent an opportunity to prove the process, the cutover organisation, the cutover plan and any protections
  • Rehearsals expose issues and risks that you can eliminate before the big event
  • Start with a small scope, based on the foundations of a working target, with minimum business functionality
  • Build out concentric layers of ever increasing scope, with lower business-critical services first 
  • Increase the investment, complexity and duration of each rehearsal as you proceed - building confidence with each cycle
  • The goal is to rehearse, learn & refine - increasing confidence and reducing risk
  • Recognise that you may never get to rehearse the full cutover scope - that's where most of your residual risk will lie

9. Anticipate and manage issues

Challenges New There's never been a Cutover of any scale that hasn't experienced issues. Doubt there ever will be. Think of these as "challenges to be overcome" when they arise.

How well issues are identified, managed and resolved is going to be key to your success.

  • It is absolutely guaranteed that things will go wrong on cutover day - so build a process to deal with these challenges when they arise
  • Don't be restricted to “Business and Usual” (BAU) approaches, processes and constraints - because a major cutover event is anything but BAU
  • Use rehearsals to create and validate a lean, efficient “issue resolution machine”
  • Apply discipline during rehearsals – don’t accept any “we’ll do it differently when it’s for real” excuses
  • Ensure that the solution that you use can connect cutover issues with Production Incident Management processes

10. Look after your team

Network NewCutovers are marathons in preparation mode and high-intensity sprints during the event itself.

People need to perform well under what is often a highly pressurised situation. Look after them all, whether staff or 3rd parties.

  • Be mindful of workload over a sustained period of time and plan accordingly
  • Operate multiple shifts during cutover events -  ideally no more than 9 hours per shift
  • Invest in support logistics for your team, such as hotels and transport services 
  • Ensure the well-being of your team at all times - including food, refreshments and crucially, adequate rest
  • Teams of people are the only way to get the job done. Focus on this key fact to succeed.


Achieving a successful technology cutover is one of the most demanding challenges that any organisation can face.  Give yourself the best possible chance of success by putting these ideas into practise as you prepare for your cutover event. 

Related Blogs

5-Layers to successfully organise your technology cutovers

ICEFLO: SatNav for Technology Cutovers


Topics:cutoverorganisationreduced risk of cutover failurecutover strategy