---
title: Attendance-to-Payroll Integration | Case Study | Liran Haber
description: Approved time and leave for about 300 hourly employees reach payroll reliably. The first monthly run delivered about 5,500 shifts.
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[Case studies](https://liranhaber.com/case-studies?hsLang=en)/Case 04

Case 04 · Workforce & payroll

# Reliable Attendance-to-Payroll Integration at Workforce Scale

A multi-site business with roughly 300 hourly employees needed approved time and leave to reach payroll reliably, without manual transfers or month-end firefighting. I mapped HR policy with the team, then built a one-way integration that adds what payroll is missing without ever overwriting the payroll team's corrections, and sends suspect data to HR with a clear reason. After HR sign-off, the first monthly run delivered about 5,500 shifts into payroll.

![Case 04 cover: Attendance to payroll, reliably. About 5,500 shifts in the first monthly run. Time and leave, policy checks, payroll.](https://liranhaber.com/hs-fs/hubfs/case-studies/case-study-04-cover.png?width=960&height=720&name=case-study-04-cover.png)

## The big picture

### Payroll stays in control

The integration adds, never overwrites.

### Policy first

HR rules agreed before anything was automated.

### Exceptions surface early

Suspect data goes to HR with a clear reason.

## How the system fits together

[![Case 04 system map: Adds to payroll, never overwrites. Every run: approved time and leave, HR policy rules, payroll. Safeguards: adds only what is missing, payroll corrections preserved, exceptions go to HR.](https://liranhaber.com/hs-fs/hubfs/case-studies/case-study-04-system-map.png?width=1600&height=767&name=case-study-04-system-map.png)](https://liranhaber.com/hubfs/case-studies/case-study-04-system-map.png?hsLang=en)

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