How Long Does an ERP Implementation Take? A Planning Guide for Canadian Teams

Ask what the proposed timeline actually covers

Before comparing durations, agree on the starting point and the endpoint. Does the estimate begin with discovery, the signed agreement or the first configuration workshop? Does it end when users sign in, after launch support or after the first financial close?

A date without those boundaries is difficult to assess. Two providers may describe different amounts of work using the same phrase, such as “implementation complete.” Ask for the deliverables and business responsibilities included in each stage.

Separate the target date from the current forecast. The target is when you want to launch; the forecast reflects what the team can reasonably complete with the available resources. Update the forecast when evidence changes rather than keeping an outdated date in the plan.

Microsoft’s project planning guidance recommends linking activities, responsibilities and dependencies. Ask your partner to explain which unfinished activities would prevent the next stage from starting.

Define the first release before estimating its duration

A first release covering finance and purchasing differs from one introducing production, several warehouses and connections to external applications. Write down the companies, locations and processes included at launch, along with what will remain elsewhere.

Identify the business outcome for each process. For purchasing, this might mean an approved order can be received, invoiced and posted correctly. Describing the outcome helps the team identify the setup, data and testing needed to reach it.

Confirm the requirements that are still undecided. A report with no agreed calculations or an integration awaiting technical review should appear as an open dependency. Assign someone to resolve it and explain how the uncertainty affects the forecast.

Record later requests through an agreed change process. Adding a location or changing a workflow can affect configuration, migration, training and testing together. Review the full impact before accepting the request into the launch scope.

Plan around evidence of progress

Use milestones that show what the business can review or approve. Activities may overlap, but each milestone should have clear completion criteria. Four useful planning checkpoints are:

Ask what evidence will be reviewed at each checkpoint. A configuration task marked complete does not tell you whether an employee has tested it or whether the related financial entries are correct. Progress reports should make those differences visible.

Distinguish working hours from calendar time

Effort is the time spent doing a task. Duration is the elapsed time needed to finish it. A task requiring a small number of working hours can still stretch across several weeks if the responsible people have limited availability.

Reserve time for decisions, data preparation and testing before the project begins. Check whether the same employee is expected to support several activities at once. Moving workshops earlier will not help if the person approving the results is unavailable.

Start data preparation before the final migration

Identify the source systems and records that need to move. These may include customer and supplier details, items, opening balances and unfinished transactions. Decide which historical information will remain accessible in an archive.

Review data quality early. Duplicate accounts, inconsistent item codes or missing fields can delay mapping and testing. Assign business reviewers who can explain uncertain records and approve corrections rather than leaving those decisions to the migration team.

Schedule trial transfers and checks before the final move. Confirm that totals reconcile, required fields are populated and employees can complete representative tasks with the transferred records. Record the time required for both the transfer and the business review.

For a move from Dynamics GP, Joesoftware’s migration guidance discusses deciding what to transfer and what to archive. Make those choices early enough to plan the preparation and validation work.

Identify dependencies outside the ERP team

Integrations may depend on another provider, a connector subscription, access approval or changes to an existing application. List those requirements and confirm who can supply them. Include lead times instead of assuming everything will be available immediately.

Ask the team to test complete exchanges, not just connectivity. An order arriving in the ERP is only part of the process if returns, customer updates or shipment details must travel back to the other system.

Reports can create similar dependencies. The team may need agreed definitions, approved layouts or access to another data source. Supply examples and identify reviewers early so report preparation does not wait until the final testing period.

Work may proceed in parallel where the inputs and people are available. Ask which activities can overlap safely and which must wait for confirmed data or configuration. Starting everything at once can create rework rather than save time.

Allow time to test, correct and test again

Testing should show that the agreed processes work for the business. Include normal transactions and important exceptions: a partial delivery, a rejected approval, a return or an invoice correction, as relevant to your operations.

Plan for the complete cycle. Employees need time to prepare scenarios, run them, record problems and review corrections. If a change affects a connected process or report, the team may need to check that area again.

Microsoft’s test planning guidance describes entry criteria, expected results and responsibility for testing. Agree on the relevant checks before booking the final acceptance period, and confirm that reviewers have the required access and records.

A date labelled “testing” is not enough. State which processes must pass, who accepts the results and how serious unresolved issues will be handled. Keep room in the schedule for corrections rather than assuming every test succeeds first time.

Coordinate training with the system employees will use

Introduce the project early so employees understand what is changing and when they will be involved. Arrange detailed task training when the configured processes are stable enough for useful practice.

Group training by role. Warehouse employees, purchasers and finance staff need different activities and permissions. Let them practise realistic tasks and ask questions, rather than relying entirely on a demonstration they watch once.

Include cover for absences and the people who provide first-line help. If a workflow changes after training, arrange an explanation and further practice. A completed attendance list does not establish that employees can carry out the work.

Choose a launch window that fits business operations

Review the calendar with finance and operations. Consider financial close, inventory counts, payroll activity, seasonal peaks and planned absences. Canadian public holidays and provincial differences can affect which employees and providers are available.

Agree on the period when transactions will stop in the old system and begin in the new one. Identify which orders, receipts, invoices and balances must be brought across, and how activity during the transition will be controlled.

Microsoft’s cutover guidance recommends planning and rehearsing the switch. Measure the relevant tasks in a trial run, assign backup contacts and establish the decision points for proceeding or stopping.

A weekend is not automatically the right window. Warehouses may operate then, and key staff may be unavailable. Choose the window based on the required work, acceptable interruption and people needed to verify the result.

Use readiness criteria to protect the launch decision

Before launch, review essential process tests, data reconciliation, user access, employee preparation and support arrangements. Assign someone with authority to make the final decision and document what evidence they need.

Separate issues that prevent essential work from those the business can accept temporarily. A minor report layout problem is different from incorrect opening balances or an unusable order process. Any temporary workaround should have an owner and an agreed follow-up.

If the current forecast no longer fits the target date, present the options clearly. These may include changing staff availability, reducing the first-release scope or moving the date. Explain the effect of each option rather than quietly removing testing or data checks.

Plan the period after the system goes live

Launch begins live operation; it does not mean every project activity has ended. Employees may need help with unfamiliar exceptions, the first payment cycle, inventory adjustments or the first month-end close.

Agree on how long the implementation team remains involved, what work is included and when ongoing support takes over. Confirm how issues are reported and which people can approve changes. Keep later improvements separate from correcting agreed launch work.

When considering a phased rollout, plan the links between phases. Finance launched before inventory, for example, may need temporary procedures for transactions still processed elsewhere. Include the preparation and removal of those procedures in the schedule.