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Step one: list the records you already keep
Start with what exists today. Gather every place employee information lives: spreadsheets, signed forms, email threads, payroll exports and shared folders. Group items into identity details, employment terms, time off, documents and performance notes. The aim is an inventory, not a design. Worked example: a twenty-five person landscaping firm finds that start dates sit in payroll, certifications sit in a manager's inbox, and leave balances sit in a personal spreadsheet. Seeing three owners for three record types shows that the first module should be a single employee profile with attached documents, before anything fancier is considered.
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Step two: rank modules by risk and repetition
Next, score each candidate module on two questions: what goes wrong if this is missing, and how often does the task repeat? Expired certifications or missing agreements carry risk, while leave requests repeat weekly. In the landscaping example, certification tracking scores high on risk, and leave scores high on repetition. Onboarding checklists score moderately on both. Order the modules accordingly: profile and documents first, certification reminders second, leave third. Recruiting, performance reviews and reporting can wait. This ranking gives a vendor or builder a clear brief and prevents paying for features nobody will open in the first year.
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Step three: assign owners and a review rhythm
A module is only useful when someone is responsible for it. For each chosen module, name who enters data, who approves changes and who can view sensitive fields. Then set a review rhythm, such as a monthly check for expiring items and a yearly audit of access. In the landscaping firm, the office manager owns profiles, the operations lead approves leave, and the owner alone sees pay details. Write these rules in one page before configuring any tool. Clear ownership and a calendar reminder do more for record quality than extra features, and they make later migration far easier.