--- title: How to create an alert when waste is greater than 5%? description: When creating a trigger in Fusion Manager, you can create a conditional expression so the alert triggers only when waste exceeds a defined threshold. --- [Skip to content](https://support.ofsystems.com/how-to-create-an-alert-when-waste-is-greater-than-5#main-content) ![OFS\_Circle.png\]](https://support.ofsystems.com/hs-fs/hubfs/OFS_Circle.png?height=45&name=OFS_Circle.png) - [OFS Customer Portal](https://support.ofsystems.com/) - [Main Website](https://ofsystems.com/) - [Contact Us](https://www.ofsystems.com/contact-us?) - [Service Portal](https://ofsystems.atlassian.net/servicedesk/customer/portal/1) Open main navigation Close main navigation - [OFS Customer Portal](https://support.ofsystems.com/) - [Main Website](https://ofsystems.com/) - [Contact Us](https://www.ofsystems.com/contact-us?) - [Service Portal](https://ofsystems.atlassian.net/servicedesk/customer/portal/1) Welcome to the OFS Customer Portal - There are no suggestions because the search field is empty. 1. [OFS Customer Portal](https://support.ofsystems.com/?hsLang=en) 2. [How To Questions](https://support.ofsystems.com/how-to-questions?hsLang=en) 3. [Flow - Conditional Expression & Triggers](https://support.ofsystems.com/how-to-questions?hsLang=en#flow-conditional-expression-triggers) # How to create an alert when waste is greater than 5%? ## When creating a trigger in Fusion Manager, you can add a conditional expression so the alert only fires when waste on the running job goes past a threshold you set. #### **What you'll build** - An alert that checks the running job while the line is running, and notifies someone when waste climbs above 5%. - A conditional expression that reads the job's quality figure, so the alert stays quiet while the job is running clean. #### **Step 1 - Create a new Alert in Fusion Manager** - In an Alert Group \> New Alert - Name the alert e.g. Alert when waste is greater than 5% - Create the Alert Message e.g. Waste is \> 5% - ![](https://support.ofsystems.com/hs-fs/hubfs/image-png-May-07-2026-03-06-54-1577-AM.png?width=670&height=381&name=image-png-May-07-2026-03-06-54-1577-AM.png) #### **Step 2 — Add a Machine State trigger** Go to the **Triggers** tab, select **Machine State** and click the **+** button.   ![](https://support.ofsystems.com/hs-fs/hubfs/image-png-May-07-2026-03-07-44-3113-AM.png?width=670&height=259&name=image-png-May-07-2026-03-07-44-3113-AM.png)   #### **Step 3 — Select the Running machine state** Choose **Running**, so the check only happens while the line is actually producing. #### **Step 4 — Set Offset and Repeat** Toggle on **Offset** and **Repeat**, then enter a value, for example 5 minutes. Offset is how long into the run the first check happens; Repeat is how often it happens after that. #### **Step 5 — Select the lines and services** Choose the **Lines** the alert should watch, and the **Services** that should deliver the message. These two do different jobs: lines decide what is watched, services decide who hears about it. A trigger with no service attached still raises the alert and records it, but notifies nobody.   ![](https://support.ofsystems.com/hs-fs/hubfs/image-png-May-07-2026-03-10-17-0959-AM.png?width=670&height=449&name=image-png-May-07-2026-03-10-17-0959-AM.png)   #### **Step 6 — Add the conditional expression** Click the **Conditional Expression** tab, toggle it **On**, and enter: ``` job.metrics.quality<=0.95 ``` ![](https://support.ofsystems.com/hs-fs/hubfs/image-png-May-07-2026-03-11-30-6478-AM.png?width=670&height=593&name=image-png-May-07-2026-03-11-30-6478-AM.png) Quality is the proportion of good units, expressed as a decimal. Waste of 5% means quality of 95%, so 0.95 is the threshold.   #### **Step 7 — Save** Click **Update**, then **Save** on the page. The dialog's own button stages the change; the page-level **Save** is what commits it.   ![](https://support.ofsystems.com/hs-fs/hubfs/image-png-May-07-2026-03-12-44-7664-AM.png?width=670&height=266&name=image-png-May-07-2026-03-12-44-7664-AM.png)   #### **Test it** Run a job and log enough waste to push quality below the threshold. The alert should fire at the next check, not immediately — the Offset and Repeat decide the timing. If nothing arrives, confirm the alert is not disabled, the trigger has both a line and a service, and the condition is not sitting empty. An enabled conditional expression with nothing typed in it never fires. #### **Adapting it to your own threshold** - Change `0.95` to suit your target. 2% waste is `0.98`, 10% waste is `0.90`. Always enter the figure as a decimal, not a percentage. - `<=0.95` fires at exactly 5% waste as well as above it. If you want it to fire only past 5%, use `<0.95`. - Shorten the Repeat interval if you want to hear about it sooner, but bear in mind each repeat is another notification for as long as the job stays above the threshold. A full list of variables is available in the [Alert Variables](https://support.ofsystems.com/alert-variables?hsLang=en) article. - [Getting Started](https://support.ofsystems.com/getting-started?hsLang=en#main-content) - [Console: The Basics](https://support.ofsystems.com/getting-started?hsLang=en#console-the-basics) - [Analytics: The Basics](https://support.ofsystems.com/getting-started?hsLang=en#analytics-the-basics) - [Fusion Manager: The Basics](https://support.ofsystems.com/getting-started?hsLang=en#fusion-manager-the-basics) - [OFS-Flow Training : The Basics](https://support.ofsystems.com/getting-started?hsLang=en#ofs-flow-training-the-basics) - [OFS-Go](https://support.ofsystems.com/getting-started?hsLang=en#ofs-go) - [MayvnAI](https://support.ofsystems.com/getting-started?hsLang=en#mayvnai) - [Help & Support](https://support.ofsystems.com/help-support?hsLang=en#main-content) - [Troubleshooting](https://support.ofsystems.com/help-support?hsLang=en#troubleshooting) - [OFS in a Box](https://support.ofsystems.com/help-support?hsLang=en#ofs-in-a-box) - [Routers](https://support.ofsystems.com/help-support?hsLang=en#routers) - [PLCs](https://support.ofsystems.com/help-support?hsLang=en#plcs) - [Success with MayvnAI](https://support.ofsystems.com/success-with-mayvnai?hsLang=en) - [Training Videos](https://support.ofsystems.com/training-videos?hsLang=en#main-content) - [Operator Console](https://support.ofsystems.com/training-videos?hsLang=en#operator-console) - [OFS Analytics](https://support.ofsystems.com/training-videos?hsLang=en#ofs-analytics) - [Fusion-Manager](https://support.ofsystems.com/training-videos?hsLang=en#fusion-manager) - [OFS-Flow](https://support.ofsystems.com/training-videos?hsLang=en#ofs-flow) - [OFS-Go](https://support.ofsystems.com/training-videos?hsLang=en#ofs-go) - [How To Questions](https://support.ofsystems.com/how-to-questions?hsLang=en#main-content) - [Administration](https://support.ofsystems.com/how-to-questions?hsLang=en#administration) - [Operator Console](https://support.ofsystems.com/how-to-questions?hsLang=en#operator-console) - [Analytics](https://support.ofsystems.com/how-to-questions?hsLang=en#analytics) - [Fusion Manager](https://support.ofsystems.com/how-to-questions?hsLang=en#fusion-manager) - [Fusion Manager - Alerts & Services](https://support.ofsystems.com/how-to-questions?hsLang=en#fusion-manager-alerts-services) - [Flow](https://support.ofsystems.com/how-to-questions?hsLang=en#flow) - [Flow - Validations](https://support.ofsystems.com/how-to-questions?hsLang=en#flow-validations) - [Flow - Conditional Expression & Triggers](https://support.ofsystems.com/how-to-questions?hsLang=en#flow-conditional-expression-triggers) - [APIs](https://support.ofsystems.com/how-to-questions?hsLang=en#apis) - [FAQs](https://support.ofsystems.com/faqs?hsLang=en#main-content) - [Operator Console](https://support.ofsystems.com/faqs?hsLang=en#operator-console) - [Fusion Manager](https://support.ofsystems.com/faqs?hsLang=en#fusion-manager) - [Analytics](https://support.ofsystems.com/faqs?hsLang=en#analytics) - [OFS-Flow](https://support.ofsystems.com/faqs?hsLang=en#ofs-flow) - [Case Studies](https://support.ofsystems.com/case-studies?hsLang=en#main-content) - [Mavyn AI](https://support.ofsystems.com/case-studies?hsLang=en#mavyn-ai) - [OFS Guides](https://support.ofsystems.com/ofs-guides?hsLang=en) - [Webinars](https://support.ofsystems.com/webinars?hsLang=en) [![](https://support.ofsystems.com/hs-fs/hubfs/Logo%20Medium_no%20words.png?width=128&height=68&name=Logo%20Medium_no%20words.png)](http://ofsystems.com) Operations Feedback Pty Ltd 7/627 Chapel St, South Yarra, VIC 3123 +61 3 8684 9859 [mailto:support@ofsystems.com](mailto:support@ofsystems.com) Copyright © 2025, Operations Feedback Systems Pty Ltd.