How long should two contact center systems run in parallel?

Running two contact center systems in parallel usually takes between four and twelve weeks. Exactly how long depends on the volume of customer contact, the complexity of the integrations, and the pace at which employees and processes transition to the new platform. The longer the parallel period lasts, the higher the operational and financial pressure. In this article, we answer the most frequently asked questions about parallel migrations in contact centers, from the risks to the decision to switch over permanently.

What determines how long two systems must run in parallel?

The duration of a parallel period during a contact center migration is determined by four factors: the complexity of your current environment, the number of channels being migrated, the degree of integration with other systems, and the speed at which employees master the new system. The more dependencies there are, the longer the overlap is necessary.

Organizations with a simple telephony environment and few links can sometimes switch after just a few weeks. But for medium-sized service organizations with omnichannel customer contact, multiple departments, and links to CRM or back-office systems, eight to twelve weeks is more realistic. The parallel period is not a sign of a difficult migration. It is a conscious choice to ensure continuity while you validate the new system step-by-step.

What also influences the period is the quality of the preparation. Organizations that clearly map out which processes, channels, and data will transition beforehand significantly shorten the parallel phase. Without that preparation, you run the risk of having to make fundamental choices during the overlap, which actually extends the duration.

What are the risks of running in parallel for too long?

Running contact center systems side-by-side for too long increases operational pressure, raises costs, and undermines confidence in the new system. Employees continue to fall back on the familiar old system, which slows down the adoption of the new platform and effectively stalls the migration.

Concrete risks of an excessively long parallel period include:

• Double licensing costs: you pay for two platforms at once, while the value of the new system is not yet fully utilized.
• Data pollution: customer data is maintained in two systems, leading to inconsistencies and errors in reporting.
• Fragmented customer contact: some channels run through the old system, others through the new one, meaning employees and customers do not have a unified view.
• Employee resistance: as long as the old system is available, the urgency to learn the new one disappears.
• Loss of momentum: project teams become fatigued and support for the migration declines.

A parallel period is valuable as a transition ritual, but it has an expiration date. Without a clear end date, it becomes a permanent state of uncertainty.

When is it safe to turn off the old system?

It is safe to turn off the old system when the new system handles all critical processes stably, employees work with it independently, and there are no outstanding data migration points. These are the three minimum criteria for a responsible shutdown.

In addition to these basic conditions, there are additional signals indicating you are ready:

• The new system has handled peak loads for at least two to four weeks without issues.
• All reports and dashboards are running entirely on the new platform.
• Integrations with CRM, ticketing systems, and other tools are validated and stable.
• A fallback scenario has been documented, even if you don’t expect to need it.
• Employees no longer report structural problems and escalations have returned to a normal level.

Don’t wait for perfection. A system that handles 95% of situations well, where the remaining 5% is known and manageable, is ready for the switch. Waiting for the final percentage points costs more than it delivers.

How do you shorten the parallel period without extra risk?

You shorten the parallel period during a phased migration of your contact center by starting with a clear scope, beginning training early, and implementing the migration channel by channel or team by team instead of everything at once. This way, you build confidence without blocking operations.

Practical measures that shorten the overlap:

1. Work with a pilot group: let a small team be the first to fully transition to the new system. This allows you to discover bottlenecks before the entire organization switches.
2. Set a hard end date: communicate internally when the old system will be turned off. This creates urgency and prevents procrastination.
3. Migrate channel by channel: start with telephony or email, validate that it runs stably, and then add chat or other channels.
4. Provide a shared dashboard: make the performance of the new system visible to everyone. Transparency about what is going well accelerates adoption.
5. Assign clear responsibility: appoint an owner per channel or team who is responsible for the transition and the reporting on it.

The most effective reduction is found in the preparation. Organizations that start mapping out processes, data, and integrations three to six months before go-live have much less to manage during the parallel period.

What does a parallel migration period cost in practice?

The costs of a parallel migration period consist of three components: double licenses or subscription fees for two platforms, extra capacity for management and support, and the hidden costs of reduced productivity during the transition. This combination makes running in parallel more expensive than organizations often estimate beforehand.

Licensing costs are the most visible item. Depending on the number of users and the contract type of the old system, these costs can increase significantly per month. But the less visible costs are often larger: employees working in two systems make more mistakes, have longer handling times, and require more support. This lowers productivity and increases workload.

Management costs are added to that. Two systems require twice the attention from your IT department or supplier, twice the monitoring, and twice the incident follow-up. For organizations with limited IT capacity, that is a real burden.

The conclusion is clear: every week that the parallel period is unnecessarily extended costs money. Investing in fast and careful preparation pays for itself in a shorter overlap and lower total migration costs.

Who is responsible for the decision to switch over?

The decision to permanently turn off the old contact center system lies with the operationally responsible manager, in collaboration with IT and the migration project owner. None of these parties can make this decision alone, as the impact is both technical and operational.

In practice, we see that this decision often stalls because no one is the formal owner. The IT department waits for a green light from the business, the business waits for confirmation from IT, and the project manager has no mandate to push through. This leads to a silent extension of the parallel period without anyone consciously choosing it.

Prevent this by agreeing at the start of the migration who will make the go/no-go decision, based on which criteria, and within what timeframe. Record this in a decision document and ensure all stakeholders sign it. This turns an informal agreement into a formal milestone.

In larger organizations, it is wise to involve the board or management team in the final decision, especially when it concerns systems that process business-critical customer contact. The risks of wrong timing are significant enough to place that responsibility at the right level.

How Pegamento helps with your contact center migration

We guide organizations through the entire migration process, from the initial analysis to the final shutdown of the old system and the ongoing optimization thereafter. No fragmented approach with multiple suppliers, but everything under one roof with a single point of contact.

What we specifically do for you:

• Custom migration planning: no expensive custom work, but a smart combination of proven modules that align with your processes and systems.
• Channel integration: we ensure that omnichannel communication via telephony, email, chat, and other channels comes together seamlessly in one environment.
• Employee guidance: we support your team during the parallel period so that adoption happens quickly and the overlap remains as short as possible.
• Clear go/no-go criteria: we help you formalize the decision to switch, so no one is left waiting in a vacuum.
• Ongoing management and optimization: even after the migration, we remain involved so that the new system continues to perform and grow with your organization.

Pegamento is certified according to ISO 27001 (information security), ISO 9001, and ISO 26000. We work from a clear architecture and take responsibility for the entire process. Want to know how long your parallel period is realistically and how to keep it as short as possible? Contact us for a no-obligation consultation.