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SPC Software

Plan, monitor, and control manufacturing processes.
Software CAQ.Net
Complete traceability
of inspection and process data
Standard-compliant & individual
sampling & inspection plans
Notification in case of
process and tolerance violations

SPC Software
Statistical Process Control in the quality inspection software Compact.Net

Digitizing Statistical Process Control

Implementing statistical process control (SPC) in manufacturing is often complex: measurement and inspection data are recorded manually, evaluations are delayed, and deviations remain undetected for too long. Different inspection plans, standards, and sampling procedures – such as those according to ISO 2859 or ISO 3951 – increase the effort and risk of errors. In addition, there is often a lack of complete traceability, which is required by standards such as ISO 9001 or IATF 16949.

The SPC Software Compact.Net records and analyzes quality data in real time, automatically detects trends, runs, and outliers, and immediately informs the responsible persons in the event of deviations. Inspection plans, inspection frequencies, and shift models can be flexibly adapted to production processes. All data is automatically documented, versioned, and historicized – for full transparency, standard compliance, and stable, controlled processes.


The SPC Process in the Software


- Determination of the manufacturing processes to be monitored.
- Determination of warning thresholds and intervention limits for process control.
- Selection of suitable inspection plan structures and inspection plan types, individually tailored to the respective processes.


- Use of standardized incoming goods inspection plans in accordance with ISO 2859-1, ISO 2859-3, or ISO 3951-1 in normal, stricter, or reduced variants.
- Application of flexible skip lot procedures or freely definable process-accompanying inspections.
- Creation of demand-oriented inspection plans, interval inspections, or SPC nest inspections.
- Integration of additional information such as graphics, videos, drawings, and document references (e.g., work instructions, audits).


- Definition of freely definable sampling plans and characteristic specifications.
- Use of integrated mathematical and statistical formulas to create new characteristics.
- Use of predefined characteristic types (e.g., OK/NOK, classified characteristics).


- Individual definition of inspection frequencies depending on process requirements.
- Option to create shift-based inspection models tailored to working hours and staff availability.
- Adjustment of inspection intervals to qualitative or quantitative characteristics.


- Simulation of test orders using the inspection plans created.
- Checking for completeness, functionality, and suitability for practical use.
- Adjustment and optimization of inspection parameters based on test results.


- Automated statistical process control with outlier, trend, and run analyses.
- Continuous monitoring of process data in real time.
- Automatic notification of defined groups of people in the event of process violations, tolerance exceedances, or anomalies.

Compact.Net – More than just SPC

In addition to classic SPC functions, Compact.Net offers a comprehensive solution for inspection planning and quality inspection – with the following advantages and features, among others:

  • All-in-one solution for incoming goods, intermediate, and final inspections as well as SPC and assembly inspections – all in one system.
  • Inspection planning based on templates and CAD: Inspection plans can be generated using family inspection plans, CAD drawing integration, or templates – including feature specifications.
  • Machine & process capability: Calculation of capability indices Pm/Pmk, Pp/Ppk, Cp/Cpk, and calculation of action limits .
  • Automated data connection: Direct transfer of measured values from measuring machines, as well as barcode, NFC tag, and QR code capture via mobile and stationary devices – to reduce manual errors.
  • Detailed evaluations: Control charts, machine and process capability, statistical tools, potential analysis, measurement data validation via machine learning, export of measurement data, and automatic generation of printouts and certificates.
  • Traceability and versioning: Seamless version management of inspection plans, history, and change log.

SPC Software FAQ

What are the advantages of introducing SPC software?

It reduces scrap and error rates, increases process stability and transparency, and supports audits with complete documentation. This gives companies control over their manufacturing quality and increases their efficiency.

Is SPC software only suitable for large companies?

No, Compact.Net is scalable and can be used in both small manufacturing companies and large corporations. The software can be combined with other modules, such as the calibration management PMM.Net or the initial sample inspection EMP.Net, to form a comprehensive CAQ system.

Which standards and regulations does the SPC software support?

Compact.Net supports standards such as ISO 9001, IATF 16949, and ISO 13485, as well as sampling standards such as ISO 2859-1, ISO 2859-3, and ISO 3951-1. This makes the SPC Software suitable for use in a wide range of industries in compliance with standards.

Why CAQ AG?

Service Commitment and Product Philosophy

Our understanding of service is based on supporting our customers in each and every aspect relating to our software solutions. With our maintenance contract, we offer a complete package that includes everything you need to ensure continuous support for your CAQ.Net software solution before, during, and after implementation.
  • Included
    Updates, Upgrades & Release Changes
  • Included
    Support from QM & IT Professionals
  • Included
    User Workshops
  • Included
    Screencasts
  • Included
    Conformity to Standards
  • Included
    Information Security
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