A new supervisor’s first 90 days

01

Before day one: agree on the job

A promotion rarely comes with a clean boundary between your old work and your new responsibilities. Ask your manager to name the decisions you own, the work you should stop doing, and the situations you must escalate. Put those answers in writing.

Choose one operational measure you can already observe—such as rework, missed handoffs or schedule reliability. Record the starting point and the source. This is a baseline for learning, not a promise of a particular improvement.

• Ask: “What should this team be able to rely on me for by day 90?”
• Agree on a short weekly check-in with your manager.
• Identify who handles safety concerns, employee relations and urgent customer issues. Follow company procedures.

02

Days 1–30: listen, observe, make expectations clear

Meet each person individually. Ask what good work looks like, where work gets stuck and what they need from a supervisor. Spend time observing the actual workflow, including the handoffs between people or shifts.

End the month with a short team agreement: the immediate priorities, what “done” means, who owns which decisions and how people raise a problem. If you now supervise former peers, explain what has changed without pretending the relationship is unchanged.

• Hold an introductory one-to-one with each direct report.
• Write down the team’s two or three immediate priorities.
• Review your observations with your manager before announcing major changes.

03

Days 31–60: practice feedback and delegation

Pick one recurring task to delegate with a clear outcome, boundaries and a check-in time. Ask the person to describe the next step in their own words. Delegation is not dropping work on someone and waiting for the deadline.

Give feedback close to the work: describe what you observed, explain the effect and ask for the other person’s perspective. Agree on the next action. Use established HR procedures for formal performance or conduct issues; a practice conversation is not a substitute for them.

• Delegate one task and review the result without taking the task back at the first difficulty.
• Practice one feedback conversation with a manager or trusted peer.
• Keep one-to-ones focused on obstacles, priorities and support—not just a status list.

04

Days 61–90: improve one thing and show your work

Choose one manageable problem with the team. Describe the current process, test a small change and compare what happens with the starting point. Note changes in workload or staffing so you do not mistake a coincidence for the effect of your intervention.

At the 90-day review, bring examples rather than a list of courses completed: a clearer handoff, a delegated task, feedback you acted on and a decision you escalated appropriately. Ask your manager which habit you should strengthen next.

• Review the baseline measure and what else changed during the period.
• Ask the team what has become clearer and what still gets in the way.
• Agree on one development priority for the next quarter.

05

Make training support the job

Choose training around a live challenge rather than sending a new supervisor through every available course. A coaching workshop is useful when there is a real conversation to prepare for and a manager who can debrief it afterward.

This plan is an editorial starting point, not a validated assessment or a guarantee of readiness. Adapt the timeline for the role, work environment and company policies. The supervisor’s manager still owns support and review.