KEY TAKEAWAYS
- Choose the scope around operator and reporting needs, not software labels.
- Document the boundary between reading equipment data and issuing commands.
- Validate tag meaning, timestamps and quality flags across applications.
In this resource
Start with who uses the information
A request for a factory dashboard can describe several different needs. An operator may need a supervisory process view; a production manager may need shift losses; an energy team may need consumption reports. Clarify the user and decision before choosing the software category.
SCADA commonly concerns supervisory visibility and operation, while an IIoT monitoring application may focus on collecting equipment data and supporting analysis across assets. These functions can coexist. The project boundary matters more than treating the labels as competing answers to every application.
Separate observation from authorised control
A monitoring-only scope should identify the information read from equipment and the permissions used to access it. Do not assume that an application designed to view data is authorised to write values or issue commands.
If supervisory operation is required, define command permissions, allowed conditions, acknowledgements and the local control relationship with the responsible engineering team. Safety-related functions require their own design and validation; a reporting dashboard is not a substitute for them.
Define the interface as a data contract
For each selected tag, record identity, units, scaling, timestamp source and data-quality meaning. A gateway that receives a number has not yet established whether it represents a current reading, accumulated counter or stale value. Agree how those differences appear in the application.
An interface such as OPC UA can provide structured information exchange, but a protocol name alone does not guarantee access to a particular controller or tag. Confirm the actual equipment implementation, available options and configuration during the survey.
Choose history and reporting deliberately
Process trends, alarm histories and production shift reports need different retention and aggregation decisions. Define which raw events are needed to explain a report and how corrections or late-arriving records are handled.
Consider a site with a supervisory process view and a separate OEE report. It may be more appropriate to agree a shared asset identity and reporting interface than to replace the existing supervisory system. Test whether both applications interpret the same equipment state consistently.
Bring an application brief to the engineering discussion
A useful brief identifies existing PLCs and HMIs, required process views, production questions, site constraints and any planned control changes. Distinguish an application upgrade from a broader instrumentation or electrical project.
WhereFy SCADA and automation, industrial connectivity and monitoring solutions can be discussed as separate work packages or a defined turnkey scope. Compatibility, responsibilities and acceptance tests should be confirmed for the actual installation before implementation.
Further reading
External references provide background. Their inclusion does not imply affiliation or equipment compatibility.
Have a site-specific question about these ideas?
Discuss your application