A Practical Guide to Calculating Downtime Costs, Identifying Critical Systems, and Reducing Operational Risk
Manufacturing downtime should be measured in dollars per hour, not simply hours offline. The financial impact can include lost production, idle labor, delayed shipments, recovery expenses, overtime, and other operational costs. Even when production equipment itself is functioning, failures involving networks, ERP systems, internet connectivity, servers, identity systems, or engineering applications can interfere with the work required to keep production moving.
A practical approach is to evaluate downtime across five areas: calculate the financial impact, identify critical systems, find single points of failure, establish recovery priorities, and build resilience before an outage occurs.
The acceptable amount of downtime will be different for every manufacturer. The objective is to understand that number before a technology failure forces the company to find out.
1. Calculate the Real Cost of Manufacturing Downtime
Downtime costs extend beyond the revenue associated with the products that weren’t produced during an outage.
A manufacturer may continue paying employees who cannot perform their normal work. Production schedules can be disrupted. Orders may ship late. Employees may work overtime once systems return. IT resources or outside specialists may be required to resolve the problem. In some situations, an interruption can also affect customers and downstream operations.
A useful starting calculation is:
Estimated Downtime Cost per Hour
Lost Production Value + Idle Labor + Delayed Revenue + Recovery Costs + Other Operational Impact
Consider a manufacturer with 50 employees affected by an IT outage. If the fully burdened labor cost for those employees averages $40 per hour, the company is already absorbing approximately $2,000 per hour in idle labor costs before accounting for lost production, delayed shipments, recovery expenses, or customer impact.
That does not mean every minute of an IT outage completely stops those 50 employees. The example demonstrates why manufacturers should calculate downtime using their own operations rather than relying on a generic industry statistic.
A manufacturer that knows its approximate cost per hour can make better decisions about redundancy, infrastructure investments, recovery planning, and technology lifecycle management.
2. Identify the IT Systems That Can Disrupt Operations
Manufacturing downtime isn’t limited to mechanical failures on the production floor.
Modern manufacturing operations depend on interconnected technology. A machine may remain operational while employees lose access to the systems required to schedule work, retrieve files, communicate, process orders, manage inventory, generate shipping documents, or perform other essential functions.
Critical dependencies may include:
- ERP and business management systems
- Network infrastructure
- Internet connectivity
- Servers and cloud platforms
- Identity and authentication services
- File and document systems
- Engineering applications and data
- Email and communications
- Backup and recovery systems
- IT systems connected to or supporting production environments
The importance of each system depends on the operation.
An ERP outage might be inconvenient for one department but operationally significant for another. A network failure could affect an entire facility. Loss of access to engineering files may prevent work from progressing even when the production equipment itself is available.
Manufacturers should document these dependencies and determine which systems have the greatest potential to affect operations.
3. Find the Single Points of Failure
Once critical systems are identified, manufacturers can evaluate what each system depends on.
A business may have reliable servers but only one internet connection. A production facility may depend heavily on a network switch that has reached the end of its useful life. A critical application may rely on a single server. A recovery plan may depend on backups that have never been restored under real-world conditions.
These dependencies create single points of failure—components or services whose failure can interrupt a larger part of the operation.
The assessment should include infrastructure such as networks, internet connectivity, servers, cloud services, firewalls, power protection, applications, and backup systems. It should also consider external dependencies, including vendors responsible for specialized systems.
Age matters as well.
Technology that continues to function isn’t necessarily technology that should remain in production indefinitely. Aging infrastructure may become harder to support, replacement components may become difficult to obtain, and manufacturers may eventually face failures on a timeline they didn’t choose.
Lifecycle planning gives the organization an opportunity to replace critical infrastructure intentionally rather than during an emergency.
From the Field: When Aging Infrastructure Became an Operational Problem
An AT-NET client experienced this problem at a remote manufacturing operation.
A steel manufacturer’s Delaware office was experiencing daily network connectivity issues. The company’s corporate offices were approximately 600 miles away in Columbia, South Carolina, which added another layer of difficulty to resolving the problem.
The existing network infrastructure was outdated and unmanaged. Slow data speeds and recurring connectivity problems were affecting users, communications, network peripherals, and customer interactions.
AT-NET had been completing a communications project at their corporate office when the company requested assistance with the Delaware location. We met with company leadership to understand the requirements and determine an appropriate infrastructure solution.
Because of the operational impact, AT-NET mobilized its project and technical installation teams and was onsite in Delaware three days later.
AT-NET engineers worked through the night to remove and replace the outdated switches and routers with managed network infrastructure. The upgrade brought network speeds up to current standards at the time and created the infrastructure foundation needed for a future VoIP deployment.
The example illustrates an important aspect of downtime planning: infrastructure problems often become business problems long before a device completely fails.
Recurring slowdowns, intermittent connectivity, aging equipment, and unreliable systems should be treated as operational risk indicators rather than accepted as normal technology frustrations.
4. Establish Recovery Priorities and Acceptable Downtime
Not every system needs to be restored at the same speed.
Manufacturers should establish priorities based on the operational impact of losing each system.
A simple classification can help:
| Priority | Operational Impact | Recovery Objective |
|---|---|---|
| Critical | Production or essential operations may stop | Restore first |
| High | Significant business disruption | Restore quickly after critical systems |
| Moderate | Work can continue temporarily using alternatives | Restore after higher-priority systems |
| Low | Limited short-term operational impact | Restore as resources permit |
The specific recovery times should be determined by the manufacturer rather than copied from another company’s plan.
For each critical system, leadership should understand how long the business can operate without it and how much data the organization can afford to lose.
Those two considerations are commonly reflected in recovery planning through:
Recovery Time Objective (RTO): The target amount of time for restoring a system or service after an interruption.
Recovery Point Objective (RPO): The acceptable amount of data loss measured in time.
A company that can operate for eight hours without a particular application has different requirements from one where a one-hour outage creates significant production disruption.
The same applies to data. AT-NET’s backup guidance notes that while some systems may be adequately protected with daily backups, mission-critical data may warrant backups at least hourly, depending on recovery requirements.
The business requirement should determine the technology strategy.
5. Build Resilience Before the Outage
Reducing downtime requires more than reacting quickly when something breaks.
Manufacturers should combine proactive infrastructure management, monitoring, lifecycle planning, backup and recovery, cybersecurity, and documented response processes.
AT-NET provides clients with an internally staffed 24/7/365 help desk and reports a response time of less than 60 seconds. Clients also receive a dedicated Technical Alignment Manager (TAM) and vCIO.
Those functions address different parts of operational resilience.
The help desk provides a resource when users need immediate assistance. The Technical Alignment Manager helps keep the technology environment aligned with established standards and identifies issues that require attention. The vCIO supports longer-term planning around infrastructure, cybersecurity, lifecycle decisions, risk, and technology investment.
Backups and disaster recovery provide another layer of resilience. AT-NET’s backup approach includes immutable storage, local and off-site backup options, daily backup review, and restore support.
The objective is to reduce both the likelihood of an avoidable outage and the time required to recover when an outage does occur.
IT and OT Dependencies Should Be Evaluated Together
Manufacturers increasingly operate environments where corporate IT and operational technology depend on one another.
Production systems may depend on network infrastructure. Engineering applications may exchange information with equipment or production systems. Vendors may connect remotely to machinery. Business applications may rely on data generated on the plant floor.
These connections create efficiencies, but they also create dependencies.
A failure in the corporate network can potentially affect systems outside the traditional office environment. Likewise, changes to production-connected infrastructure can have consequences for business systems.
Manufacturers should document important IT/OT connections as part of downtime planning and understand which dependencies could create broader operational disruption.
The goal isn’t to manage every IT and OT system identically. It is to understand where they depend on each other and what happens when one of those connections fails.
Downtime Planning Should Include Cybersecurity
Operational downtime can result from equipment failure, internet outages, software problems, human error, power events, or cyberattacks.
Ransomware is particularly relevant because an attacker may intentionally disrupt multiple systems at once.
Manufacturers should account for cyber incidents when establishing recovery priorities. Critical systems should have appropriate security controls, protected backups, and documented recovery procedures.
AT-NET’s managed cybersecurity services include 24/7 monitoring and incident response, MDR/XDR, vulnerability management, managed network security, MFA, and other cybersecurity controls. AT-NET also uses immutable storage as part of its backup approach to help protect recovery data against unauthorized modification.
Business continuity, cybersecurity, and infrastructure planning are therefore closely connected.
A highly available system that isn’t adequately secured still creates risk. A secure system without a viable recovery plan creates a different risk.
7 Questions Manufacturing Leaders Should Ask About IT Downtime
Leadership can get a useful picture of downtime readiness by answering seven questions:
- Approximately how much does one hour of IT-related downtime cost our operation?
- Which five technology systems would create the greatest operational impact if they became unavailable?
- How long can we operate without each of those systems?
- Where do we have single points of failure in our infrastructure?
- How much data could we lose based on our current backup frequency?
- Do we have a documented recovery order for critical systems?
- Who is responsible for coordinating the response when a major outage occurs?
Unclear answers identify areas that deserve further evaluation.
The goal isn’t to eliminate every possible failure. That isn’t realistic.
The goal is to understand the organization’s most significant dependencies and reduce the likelihood that one technology problem creates a disproportionate business impact.
Create a Manufacturing Downtime Impact Map
A simple downtime impact map can help leadership prioritize technology investments.
Start with the systems the company relies on most heavily and document four pieces of information for each:
| System | Business/Production Impact | Maximum Acceptable Downtime | Recovery Priority |
|---|---|---|---|
| ERP | [Company-specific impact] | [Time] | Critical/High/Moderate/Low |
| Network | [Company-specific impact] | [Time] | Critical/High/Moderate/Low |
| Internet | [Company-specific impact] | [Time] | Critical/High/Moderate/Low |
| Engineering Systems | [Company-specific impact] | [Time] | Critical/High/Moderate/Low |
| File Systems | [Company-specific impact] | [Time] | Critical/High/Moderate/Low |
| Production-Supporting IT | [Company-specific impact] | [Time] | Critical/High/Moderate/Low |
The completed map gives IT and leadership a common way to discuss risk.
It can also improve budgeting decisions. If leadership determines that a particular system can only be unavailable for 30 minutes, the infrastructure and recovery strategy supporting that system should reflect that requirement.
If another system can remain unavailable for a full business day with limited consequences, it may not require the same level of investment.
This creates a more useful technology strategy than treating every system as equally critical.
Final Thoughts
Manufacturers don’t need to eliminate every minute of IT downtime. They need to understand which outages matter most, what those outages cost, and how quickly critical operations need to recover.
A practical downtime strategy includes five steps:
- Calculate the financial impact of downtime.
- Identify the technology systems most critical to operations.
- Find infrastructure and service dependencies that create single points of failure.
- Establish recovery priorities, RTOs, and RPOs based on business requirements.
- Build resilience through proactive management, monitoring, lifecycle planning, cybersecurity, backups, and recovery preparation.
AT-NET has served businesses since 1999 and supports more than 75 manufacturing clients. Its manufacturing IT approach combines an internally staffed 24/7/365 help desk, a response time of less than 60 seconds, dedicated Technical Alignment Managers and vCIOs, cybersecurity services, infrastructure management, and backup and disaster recovery capabilities.
Technology uptime isn’t valuable simply because a dashboard shows that systems are online.
It’s valuable because people can work, production can continue, orders can move, and customers can be served.
About AT-NET
AT-NET provides managed IT, cybersecurity, infrastructure, backup and disaster recovery, and strategic technology services for manufacturers throughout North Carolina, South Carolina, Florida, and Eastern Tennessee.
AT-NET works with manufacturers to identify technology risks, improve infrastructure reliability, strengthen cybersecurity, plan technology lifecycles, and prepare for disruptions before they affect operations.
How Much Would an IT Outage Cost Your Operation?
Understanding downtime risk starts with identifying the systems your operation depends on, how long you can function without them, and what it would take to recover.
AT-NET can help evaluate your manufacturing IT environment and identify infrastructure, cybersecurity, and recovery priorities based on operational impact.
