Route equipment purchase approvals with Slack, Google Sheets, and email

This template automates internal equipment and supply purchase requests for operations, HR, and IT teams. Requests are submitted via a built-in n8n form, automatically approved for small amounts, and routed to the manager via Slack for larger ones — with full logging to Google Sheets throughout.

Who this is for Operations, HR, and IT teams at Japanese companies who want to eliminate manual back-and-forth for internal purchase requests. No external form tools required.

What's included A single workflow that handles the full purchase request lifecycle:

1. Purchase Request Form — Applicants submit item details via n8n's built-in form. No external tools needed. 2. Manager Lookup — The approving manager's Slack ID is automatically retrieved from a Google Sheets mapping table. No Slack IDs in the form. 3. Request Logging — Every request is appended to Google Sheets with a unique request ID and status tracking. 4. Amount Threshold Check — Requests at or below the threshold (default: ¥10,000) are auto-approved. Requests above are routed to the manager. 5. Auto-Approval Route — Status is updated, the purchasing team is notified via Slack, and the applicant receives a confirmation email. 6. Manager Approval via Slack — The manager receives a Slack DM with a custom form: approve/reject selection and a free-text comment field. 7. Approval Route — Status is updated with approver name, purchasing team is notified via Slack, and the applicant receives a confirmation email. 8. Rejection Route — Status is updated with the rejection comment, and the applicant receives a rejection email including the manager's comment.

Key features - Built-in n8n form — no Jotform, Typeform, or Google Forms required - Manager is looked up automatically from Google Sheets — applicants never need to know or enter Slack IDs - Configurable auto-approval threshold (default: ¥10,000) - Rejection comments collected via Slack's custom form and logged to Google Sheets - Full audit trail: every request, approval, and rejection is recorded with timestamps

Prerequisites - Google Sheets (copy link provided in the workflow) - Slack App with DM permissions and Interactivity enabled (setup guide included in the workflow) - Gmail account connected to n8n

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このテンプレートは、社内の備品・消耗品購入申請を自動化します。n8n組み込みフォームで申請を受け付け、少額は自動承認、高額は上長へのSlack承認依頼と、金額に応じた柔軟なフローを実現します。全申請はGoogle Sheetsに記録されます。