{"workflow":{"id":13932,"name":"Manage engineering change requests via webhooks and Slack approvals","views":27,"recentViews":0,"totalViews":27,"createdAt":"2026-03-07T10:04:43.100Z","description":"## ⚙️ Manage Engineering Change Requests (ECR) via Slack\n\n## 📋 Overview\nStreamline your engineering change management process by integrating generic webhooks with Slack interactive approvals. This workflow receives a generic design change request, categorizes its impact level, and routes it to a Slack channel for approval.\n\nThis template is ideal for **Mechanical Engineering teams**, **Manufacturing**, and **Project Managers** who need to track drawing changes (ECR/ECO) without complex PLM software.\n\n## 🚀 How it works\n1. **Receive Request:** Catches a POST webhook containing `drawing_no` and `change_reason`.\n2. **Validation & Logic:** Ensures data integrity and determines the \"Impact Level\" (High, Medium, Low) based on keywords in the reason (e.g., \"Dimension\" triggers specific logic).\n3. **Notification:** Sends a formatted message to a designated Slack channel with a link to an approval form.\n4. **Human in the Loop:** The workflow waits (pauses) until a reviewer approves or rejects the request via the n8n form.\n5. **Final Notification:** Posts the final decision back to Slack.\n\n## 🛠️ Setup Steps\n1. **Configure Webhook:** Use the production URL of the Webhook node in your upstream application (e.g., Google Forms, internal tools, or Typeform).\n2. **Connect Slack:** Select your Slack credential and choose the channel where approval requests should be sent in the **Notify Slack** nodes.\n3. **Customize Logic:** Open the **Switch** node to adjust the keywords (e.g., \"Material\", \"Dimension\") that determine the impact level according to your company's policy.\n\n## 💡 Requirements\n- n8n (Self-hosted or Cloud)\n- Slack account and a channel for notifications","workflow":{"id":"S7oD6M9jeI4crXTE","meta":{"instanceId":"d268c8395d221f48084db7825ba19a0ea56302d1ee64fed53bbcff16e8562c88","templateCredsSetupCompleted":true},"name":"Mechanical Design Change Approval Workflow","tags":[],"nodes":[{"id":"df5d467f-a92d-4bb7-82c3-50fe15665dd5","name":"Webhook - 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Proceeding to ECO issuance.","select":"channel","channelId":{"__rl":true,"mode":"id","value":"=Enter your channel ID"},"otherOptions":{},"authentication":"oAuth2"},"credentials":{"slackOAuth2Api":{"id":"DTeTbjNVZnbwNEFb","name":"Slack account"}},"typeVersion":2.4},{"id":"c48e5ef0-4ba5-49f5-a7d0-863903844a36","name":"Notify Rejection (Slack)","type":"n8n-nodes-base.slack","position":[2288,176],"webhookId":"17fc7465-fd70-4e37-932d-e284b2f4676b","parameters":{"text":"=❌ ECR Rejected. Please review and resubmit.","select":"channel","channelId":{"__rl":true,"mode":"id","value":"=Enter your channel ID"},"otherOptions":{},"authentication":"oAuth2"},"credentials":{"slackOAuth2Api":{"id":"DTeTbjNVZnbwNEFb","name":"Slack account"}},"typeVersion":2.4},{"id":"77b995f1-0376-4e8f-8924-f4c929ad11f1","name":"Return Response (Error)","type":"n8n-nodes-base.respondToWebhook","position":[336,-128],"parameters":{"options":{"responseCode":400},"respondWith":"json","responseBody":"{\"error\": \"drawing_no and change_reason are required fields.\"}"},"typeVersion":1.5},{"id":"0c61661d-570e-4cf6-96e3-dc212865eaaf","name":"Generate ECR Metadata (Set Node)","type":"n8n-nodes-base.set","position":[704,96],"parameters":{"options":{},"assignments":{"assignments":[{"id":"1160a04b-76b7-4d7c-8cc0-745c3dcda5b3","name":"ecr_id","type":"string","value":"=ECR-{{ $now.format('yyyyMMdd-HHmm') }}"},{"id":"dadf308e-a811-41c5-a066-16067e9d9c0d","name":"token","type":"string","value":"={{ $json.data }}"},{"id":"fcc9fc2f-8a56-49a2-b3f7-ca36f720aeb3","name":"status","type":"string","value":"Pending"}]},"includeOtherFields":true},"typeVersion":3.4},{"id":"c1a765da-51c5-4068-b406-a1f90aae42a1","name":"Return Success (Respond to Webhook)","type":"n8n-nodes-base.respondToWebhook","position":[1472,80],"parameters":{"options":{},"respondWith":"json","responseBody":"={\n  \"message\": \"Request received. Approval process started.\",\n  \"id\": \"{{ $json.ecr_id }}\",\n  \"token\": \"{{ $json.token }}\",\n  \"change_reason\": \"{{ $json.body.change_reason }}\",\n  \"drawing_no\": \"{{ $json.body.drawing_no }}\",\n  \"impact_level\": \"{{ $json.impact_level }}\"\n}\n"},"typeVersion":1.5},{"id":"0dc81c06-623d-4123-ac0c-ee4bde72ca62","name":"Sticky Note","type":"n8n-nodes-base.stickyNote","position":[-1200,-704],"parameters":{"width":3760,"height":1344,"content":"## ⚙️ Manage Engineering Change Requests (ECR) via Slack\n\n## 📋 Overview\nStreamline your engineering change management process by integrating generic webhooks with Slack interactive approvals. This workflow receives a generic design change request, categorizes its impact level, and routes it to a Slack channel for approval.\n\nThis template is ideal for **Mechanical Engineering teams**, **Manufacturing**, and **Project Managers** who need to track drawing changes (ECR/ECO) without complex PLM software.\n\n## 🚀 How it works\n1. **Receive Request:** Catches a POST webhook containing `drawing_no` and `change_reason`.\n2. **Validation & Logic:** Ensures data integrity and determines the \"Impact Level\" (High, Medium, Low) based on keywords in the reason (e.g., \"Dimension\" triggers specific logic).\n3. **Notification:** Sends a formatted message to a designated Slack channel with a link to an approval form.\n4. **Human in the Loop:** The workflow waits (pauses) until a reviewer approves or rejects the request via the n8n form.\n5. **Final Notification:** Posts the final decision back to Slack.\n\n## 🛠️ Setup Steps\n1. **Configure Webhook:** Use the production URL of the Webhook node in your upstream application (e.g., Google Forms, internal tools, or Typeform).\n2. **Connect Slack:** Select your Slack credential and choose the channel where approval requests should be sent in the **Notify Slack** nodes.\n3. **Customize Logic:** Open the **Switch** node to adjust the keywords (e.g., \"Material\", \"Dimension\") that determine the impact level according to your company's policy.\n\n## 💡 Requirements\n- n8n (Self-hosted or Cloud)\n- Slack account and a channel for notifications"},"typeVersion":1},{"id":"6c2fb377-08f3-4ff9-8cfb-6fd66a138fc5","name":"Sticky Note1","type":"n8n-nodes-base.stickyNote","position":[-256,-144],"parameters":{"color":7,"width":752,"height":336,"content":"Validate Incoming Request"},"typeVersion":1},{"id":"e491d0d3-7b26-476b-8d95-1eb8ba2456de","name":"Sticky Note2","type":"n8n-nodes-base.stickyNote","position":[832,-272],"parameters":{"color":7,"width":576,"height":768,"content":"Determine Impact Level & Assign Metadata"},"typeVersion":1},{"id":"a4398b0b-950b-4f75-99d3-b1d6ee744587","name":"Sticky Note3","type":"n8n-nodes-base.stickyNote","position":[1632,-32],"parameters":{"color":7,"width":416,"height":368,"content":" Notify & Wait for Human Approval"},"typeVersion":1},{"id":"f6be5eb3-b3f6-4a49-b67a-1f658b069406","name":"Sticky Note4","type":"n8n-nodes-base.stickyNote","position":[2048,-32],"parameters":{"color":7,"width":416,"height":368,"content":" Process Decision"},"typeVersion":1},{"id":"0a650e48-3500-4541-9378-47e66a37b38d","name":"Check Decision","type":"n8n-nodes-base.switch","position":[2080,80],"parameters":{"rules":{"values":[{"conditions":{"options":{"version":3,"leftValue":"","caseSensitive":true,"typeValidation":"strict"},"combinator":"and","conditions":[{"id":"2e61dd0e-b34a-4f02-991e-6a7dec82599e","operator":{"type":"string","operation":"equals"},"leftValue":"={{ $json.decision }}","rightValue":"approve"}]}},{"conditions":{"options":{"version":3,"leftValue":"","caseSensitive":true,"typeValidation":"strict"},"combinator":"and","conditions":[{"id":"3c40e6af-6b31-4b1d-980f-56ae9d2ea5a1","operator":{"type":"string","operation":"equals"},"leftValue":"={{ $json.decision }}","rightValue":"reject"}]}}]},"options":{}},"typeVersion":3.4},{"id":"cd65a39e-d449-4f2c-ba21-88b5901521db","name":"Generate Secure Token","type":"n8n-nodes-base.crypto","position":[512,96],"parameters":{"action":"generate","encodingType":"hex"},"typeVersion":1}],"active":false,"pinData":{},"settings":{"executionOrder":"v1"},"versionId":"9ed4ac16-c745-48fb-8a58-d7234c9f671c","connections":{"Set Low":{"main":[[{"node":"Return Success (Respond to Webhook)","type":"main","index":0}]]},"Set High":{"main":[[{"node":"Return Success (Respond to Webhook)","type":"main","index":0}]]},"Set Medium":{"main":[[{"node":"Return Success (Respond to Webhook)","type":"main","index":0}]]},"Wait (Form)":{"main":[[{"node":"Check Decision","type":"main","index":0}]]},"Check Decision":{"main":[[{"node":"Notify Approval (Slack)","type":"main","index":0}],[{"node":"Notify Rejection (Slack)","type":"main","index":0}]]},"Generate Secure Token":{"main":[[{"node":"Generate ECR Metadata (Set Node)","type":"main","index":0}]]},"Set Medium (Fallback)":{"main":[[{"node":"Return Success (Respond to Webhook)","type":"main","index":0}]]},"IF - 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