--- title: Is Your WIP Draining Cash? A CNC Shop Self-Audit description: Take a 10-question self-audit to find out where work-in-process inventory is quietly tying up cash in your CNC shop, and what to fix first. image: https://www.jitbase.com/hubfs/blog-images/wip-self-audit-cnc-shops-hero.jpg --- [+1 438 942-8501](tel:+1%20438%20942-8501) [Log In](https://app.jitbase.com/) - [English](https://www.jitbase.com/blog/wip-self-audit-cnc-shops) - [Français](https://www.jitbase.com/fr/blog/encours-auto-diagnostic-atelier-cnc) [![JITbase black logo](https://www.jitbase.com/hs-fs/hubfs/Logos/jitbase-logo-black-horiz.webp?width=175&height=88&name=jitbase-logo-black-horiz.webp)](https://www.jitbase.com) - Solutions Back - Resources Back - [Plans](https://www.jitbase.com/plans) - Why JITbase Back [Book a demo](https://www.jitbase.com/demo) [Connect Machines for Free](https://sso.jitbase.com/realms/webapp/protocol/openid-connect/registrations?client_id=website-registration&response_type=code&scope=openid&redirect_uri=https://admin.jitbase.com) ![Machinist reviewing a color-coded job schedule on a tablet beside CNC machines -- work-in-process inventory audit with JITbase](https://www.jitbase.com/hubfs/blog-images/wip-self-audit-cnc-shops-hero.jpg) Blog [Production planning and scheduling](https://www.jitbase.com/blog/tag/production-planning-and-scheduling) # Is Your WIP Draining Cash? A CNC Shop Self-Audit [*written by* Judicael Deguenon on August 11, 2026](https://www.jitbase.com/blog/author/judicael-deguenon) Most CNC shop owners can tell you their revenue, their payroll, and their machine utilization off the top of their head. Far fewer can tell you how many dollars are sitting, unfinished, on the shop floor right now. That number is work-in-process inventory, and when it quietly climbs, it eats cash the same way an unnoticed leak drains a tank: gradually, then all at once when payroll or a tooling order comes due. This self-audit gives you 10 concrete signs that WIP is trapping more cash than it should, a quick way to estimate what that's costing you, and a scored path to the specific fixes that apply to your shop. **TL;DR:** - Run the 10-question audit below. Each "yes" is a specific, fixable pattern that inflates WIP days and ties up cash. - Estimate cash at risk with one formula: daily production value × excess WIP days. - Your score points to a short reading list, not a generic action plan. Fix the two or three highest-impact items first. ## The 10-Question WIP Self-Audit Answer yes or no to each. Be honest rather than aspirational; this is diagnostic, not a report card. ### Scheduling and Batch Sizing 1. **Batch sizes are set to amortize setup time, not to match actual demand.** If fixture changeovers drive lot sizes rather than order quantity, parts sit waiting for the rest of the batch to finish. See tactics for cutting setup time without inflating batches in the [setup and cycle time reduction guide](https://www.jitbase.com/blog/5-kaizen-experiments-cut-setup-cycle-time). 2. **There are no WIP limits at the cell level.** Without a cap on how much can queue between operations, queues grow until something forces a reschedule. Compare pull-based options in the [kanban vs. continuous flow comparison](https://www.jitbase.com/blog/kanban-vs-continuous-flow-wip-software). 3. **Scheduling is still push-based or spreadsheet-driven rather than finite-capacity.** Push scheduling loads work ahead of real machine and operator availability, which is one of the most common causes of high WIP in job shops. The [production planning and scheduling guide](https://www.jitbase.com/blog/production-planning-and-scheduling-guide) covers the shift to finite-capacity planning. ### Data and Visibility 1. **Cycle times used for planning are rules of thumb, not measured values.** Planners using historical averages plus a safety buffer routinely overstate standard times, which inflates planned WIP. See the technical method in the [G-code cycle time extraction workflow](https://www.jitbase.com/blog/extract-cycle-time-from-g-code-workflow). 2. **WIP is counted manually, and only weekly or at month-end.** Infrequent, manual counts mean a bottleneck can build for days before anyone notices. The [shop-floor management and WIP tracking guide](https://www.jitbase.com/blog/shop-floor-management-wip-production-monitoring) compares manual and automated tracking methods. 3. **Barcode scans or manual logs are the only way parts get tracked between operations.** Manual scanning adds handling steps and delay at every handoff. See the comparison in [IoT sensors vs. manual scanning for WIP delays](https://www.jitbase.com/blog/iot-sensors-vs-manual-scanning-eliminate-wip-delays). ### Labor and Workload 1. **You don't have a clear per-operator workload view, so you can't tell if a queue is a scheduling problem or a staffing problem.** The [operator workload indicators guide](https://www.jitbase.com/blog/measuring-operator-workload-cnc-shop-indicators) lays out five formulas for measuring this directly. 2. **When a cell falls behind, the default response is to add headcount rather than rebalance the existing team.** In many shops, existing operators have unused capacity that better allocation can unlock. See [know your operators' workload before you hire](https://www.jitbase.com/blog/overcome-the-labor-shortage-do-you-know-the-workload-of-your-operators). ### Systems and Financial Tracking 1. **Job completions reach the ERP with a lag, or get entered twice by different people.** Delayed or duplicate posting is the leading cause of phantom WIP, inventory the ERP thinks exists but the floor has already finished or never started. The [shop-floor-to-ERP integration guide](https://www.jitbase.com/blog/integrate-shop-floor-data-erp-real-time-labor-tracking-oee) covers reconciliation patterns that prevent this. 2. **Nobody has calculated what a WIP reduction would actually be worth in dollars.** Without a baseline, it's hard to justify a pilot or measure whether a change worked. The [ROI model for production management software](https://www.jitbase.com/blog/roi-production-management-software-cnc-shops) walks through the calculation. **See where your WIP is actually building up.** Real-time machine monitoring shows queue and cycle data as it happens, not at next week's count. [See Machine Monitoring](https://www.jitbase.com/machine-monitoring) ## Scoring Your Audit Count your "yes" answers. | Score | What it likely means | | --- | --- | | 0 to 3 | WIP is reasonably well controlled. Small process refinements are more useful than a platform overhaul right now. | | 4 to 6 | Cash is probably tied up somewhere specific. Isolate the highest-scoring category above and start there. | | 7 to 10 | Several compounding issues are likely inflating WIP days significantly. A structured pilot, not a single fix, is the faster path. | ### Putting a Number on It A rough estimate of cash at risk uses one formula: **Cash at risk = daily production value × excess WIP days** Example: a shop selling $7,500 of finished parts per day, carrying what it believes is 10 days more WIP than necessary, has roughly $75,000 tied up that could otherwise fund payroll, tooling, or maintenance. For the full worksheet, including carrying-cost conversion to an annual figure, see the [ROI model for production management software](https://www.jitbase.com/blog/roi-production-management-software-cnc-shops). **Turn your audit score into a dollar figure.** Get a side-by-side view of what reduced WIP days and improved scheduling are worth for a shop your size. [Estimate Your ROI](https://www.jitbase.com/return-on-investment) ## What to Read Next, Based on Your Score Rather than repeating tactics that are already covered in depth elsewhere, here's where to go depending on which questions you answered yes to. - **If questions 1 to 3 (scheduling and batching) scored highest:** start with the [production planning and scheduling guide](https://www.jitbase.com/blog/production-planning-and-scheduling-guide), then evaluate whether your shop's mix fits [kanban or continuous flow](https://www.jitbase.com/blog/kanban-vs-continuous-flow-wip-software). For high-mix environments specifically, the [capacity planning platforms for high-mix production](https://www.jitbase.com/blog/capacity-planning-scheduling-platforms-high-mix) comparison narrows vendor options. - **If questions 4 to 6 (data and visibility) scored highest:** the [shop-floor management and WIP tracking guide](https://www.jitbase.com/blog/shop-floor-management-wip-production-monitoring) is the right starting point, with the [daily production routine](https://www.jitbase.com/blog/daily-production-routine-cnc-shop-saas) article showing how a live morning review closes the visibility gap day to day. - **If questions 7 to 8 (labor and workload) scored highest:** the [operator workload indicators guide](https://www.jitbase.com/blog/measuring-operator-workload-cnc-shop-indicators) gives you the formulas, and [connected worker solutions](https://www.jitbase.com/blog/improving-efficiency-with-connected-worker-solutions) covers how real-time task visibility keeps operators from becoming the hidden bottleneck. - **If questions 9 to 10 (systems and financial tracking) scored highest:** the [shop-floor-to-ERP integration guide](https://www.jitbase.com/blog/integrate-shop-floor-data-erp-real-time-labor-tracking-oee) and the [operator-data-to-ERP/MES guide](https://www.jitbase.com/blog/connect-operator-data-erp-mes-workforce-management) both cover low-disruption ways to close the reconciliation gap. For the full workforce piece, see the [complete guide to workforce management](https://www.jitbase.com/blog/complete-guide-workforce-management-saas). **Not sure where to start?** A short conversation can help you prioritize based on your actual audit score and shop size. [Explore Production Monitoring](https://www.jitbase.com/production-monitoring) ## The Bottom Line WIP rarely drains cash through one dramatic failure. It's usually five or six small, ordinary habits, oversized batches, manual counts, rule-of-thumb cycle times, that compound quietly until the dollar figure is too large to ignore. Run the audit, score it honestly, and fix the highest-scoring category first rather than trying to overhaul everything at once. ### What counts as WIP silently draining cash? Any pattern that lets partially finished parts sit longer than necessary between operations, oversized batches, uncapped queues, or slow data reconciliation, counts. Each extra day of WIP ties up cash equal to your daily production value, whether or not anyone notices it happening. ### How many "yes" answers mean I have a real problem? Four or more suggests cash is tied up in a specific, identifiable way. Seven or more usually means several issues are compounding, and a structured pilot will resolve them faster than fixing items one at a time. ### Do I need new software to fix this, or can I start with process changes? Several audit items, batch sizing and WIP limits in particular, can improve with process changes alone. Others, like real-time cycle-time capture or ERP reconciliation, are hard to fix reliably without connected data. Start with the process changes your score points to, then decide if the data gap is the limiting factor. ### How is this different from just tracking WIP days directly? Tracking WIP days tells you the size of the problem. This audit tells you where it's coming from, so you can address the specific cause instead of generically trying to "reduce WIP" without knowing which lever to pull first. #### SHARE [mailto:email@example.com?subject=Mail%20from%20our%20Website](mailto:email@example.com?subject=Mail%20from%20our%20Website) ## Related Articles [![Production planner reviewing a digital scheduling dashboard beside CNC machines.](https://www.jitbase.com/hs-fs/hubfs/blog-images/implanter-planificateur-numerique-saas-hero.jpg?width=352&name=implanter-planificateur-numerique-saas-hero.jpg)](https://www.jitbase.com/blog/digital-production-scheduler-implementation-guide) [Production planning and scheduling](https://www.jitbase.com/blog/tag/production-planning-and-scheduling) ### [Digital Production Scheduler: A Step-by-Step Implementation Guide](https://www.jitbase.com/blog/digital-production-scheduler-implementation-guide) Read more [![Production manager and CNC operator reviewing the daily job schedule on a tablet next to a CNC machine — shop floor routine with JITbase](https://www.jitbase.com/hs-fs/hubfs/blog-images/daily-production-organization-with-saas-hero.jpg?width=352&name=daily-production-organization-with-saas-hero.jpg)](https://www.jitbase.com/blog/daily-production-routine-cnc-shop-saas) [Production planning and scheduling](https://www.jitbase.com/blog/tag/production-planning-and-scheduling) ### [Daily Production Routine for CNC Shops: Morning Review with a SaaS Platform](https://www.jitbase.com/blog/daily-production-routine-cnc-shop-saas) Read more [![Two manufacturing engineers reviewing shop-floor data on a tablet next to CNC machines — MES-ERP integration maturity diagnostic with JITbase](https://www.jitbase.com/hs-fs/hubfs/blog-images/mes-integration-maturity-diagnostic-cnc-shops-hero.jpg?width=352&name=mes-integration-maturity-diagnostic-cnc-shops-hero.jpg)](https://www.jitbase.com/blog/mes-integration-maturity-diagnostic-cnc-shops) [Production planning and scheduling](https://www.jitbase.com/blog/tag/production-planning-and-scheduling) ### [MES-ERP Integration Readiness: A Maturity Diagnostic for CNC Shops](https://www.jitbase.com/blog/mes-integration-maturity-diagnostic-cnc-shops) Read more [![CNC shop floor connected to a server via data streams, illustrating cloud vs on-premise MES and real-time WIP visibility with JITbase.](https://www.jitbase.com/hs-fs/hubfs/blog-images/cloud-vs-on-premise-mes-wip-visibility-hero.jpg?width=352&name=cloud-vs-on-premise-mes-wip-visibility-hero.jpg)](https://www.jitbase.com/blog/cloud-vs-on-premise-mes-wip-visibility) [Production planning and scheduling](https://www.jitbase.com/blog/tag/production-planning-and-scheduling) ### [Cloud MES or On-Premise MES: Which Is Better for Real-Time WIP Visibility?](https://www.jitbase.com/blog/cloud-vs-on-premise-mes-wip-visibility) Read more [![JITbase block logo](https://www.jitbase.com/hs-fs/hubfs/eca01011d7169e8c6395a8d7eebe802d.webp?width=317&height=158&name=eca01011d7169e8c6395a8d7eebe802d.webp)](https://www.jitbase.com) ![image-2](https://www.jitbase.com/hs-fs/hubfs/image-2.webp?width=156&height=78&name=image-2.webp) Solutions - [Machine Monitoring](https://www.jitbase.com/machine-monitoring) - [Production Monitoring](https://www.jitbase.com/production-monitoring) - [Scheduling & Workforce Management](https://www.jitbase.com/workforce-management) - [Edge Platform](https://www.jitbase.com/edge-platform) - [Plans](https://www.jitbase.com/plans) Resources - [Download](https://www.jitbase.com/download) - [Education](https://www.jitbase.com/education) - [Return on Investment](https://www.jitbase.com/return-on-investment) - [CNC Machines we connect](https://www.jitbase.com/machines-we-connect) - [Demo Request](https://www.jitbase.com/demo) Why JITbase - [Why JITbase](https://www.jitbase.com/why-jitbase) - [About Us](https://www.jitbase.com/about-us) - [Partners](https://www.jitbase.com/partners) - [Contact Us](https://www.jitbase.com/contact) [Book a demo](https://www.jitbase.com/demo) [Connect Machines for Free](https://sso.jitbase.com/realms/webapp-ngen/protocol/openid-connect/registrations?client_id=website-frontend&response_type=code&scope=openid%20email&redirect_uri=https://admin.jitbase.com/next-gen) © 2026 All rights reserved. - [Privacy Policy](https://www.jitbase.com/privacy-policy) ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Judicael Deguenon", "url" : "https://www.jitbase.com/blog/author/judicael-deguenon" }, "dateModified" : "2026-08-11T16:28:13.476Z", "datePublished" : "2026-08-11T16:23:28.000Z", "headline" : "Is Your WIP Draining Cash? A CNC Shop Self-Audit", "image" : [ "https://www.jitbase.com/hubfs/blog-images/wip-self-audit-cnc-shops-hero.jpg" ], "mainEntityOfPage" : { "@id" : "https://www.jitbase.com/blog/wip-self-audit-cnc-shops", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://www.jitbase.com/hubfs/logo%20jitbase%201.svg" }, "name" : "JITbase" } } ``` ```json { "@context" : "https://schema.org", "@type" : "FAQPage", "mainEntity" : [ { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "Any pattern that lets partially finished parts sit longer than necessary between operations, oversized batches, uncapped queues, or slow data reconciliation, counts. Each extra day of WIP ties up cash equal to your daily production value, whether or not anyone notices it happening." }, "name" : "What counts as WIP silently draining cash?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "Four or more suggests cash is tied up in a specific, identifiable way. Seven or more usually means several issues are compounding, and a structured pilot will resolve them faster than fixing items one at a time." }, "name" : "How many \"yes\" answers mean I have a real problem?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "Several audit items, batch sizing and WIP limits in particular, can improve with process changes alone. Others, like real-time cycle-time capture or ERP reconciliation, are hard to fix reliably without connected data. Start with the process changes your score points to, then decide if the data gap is the limiting factor." }, "name" : "Do I need new software to fix this, or can I start with process changes?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "Tracking WIP days tells you the size of the problem. This audit tells you where it's coming from, so you can address the specific cause instead of generically trying to \"reduce WIP\" without knowing which lever to pull first." }, "name" : "How is this different from just tracking WIP days directly?" } ] } ```