Why can't we have more exciting graphics?

HMIs can have spectacular graphics. Why shouldn't we use them?

02/18/2011


Dear Control Engineering: I was reading the article Gray Backgrounds for DCS Operating Displays. Why is operator response so important? Aren’t most problems caused by the equipment?

The Abnormal Situation Management Consortium says that people factors account for 42% of incidents, which is why the group spends so much time on operator training and how individuals interface with the control system. (If you’re curious, equipment factors account for 36% of incidents, and process factors for only 22%.)

If an operator has to look at an HMI screen and ask him or herself what that blinking red thing means, it means that the operator is not adequately trained, or that the HMI graphic is not consistent in its use of color. Any time spent gathering thoughts and interpreting graphics simply slows the response and allows the problem to go on longer, potentially escalating in scale and damage. Worse yet, an operator may take the wrong action if he or she doesn't understand immediately what the display is trying to say. Consistency is critical.

Peter Welander, pwelander@cfemedia.com



No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Motor specification guidelines; Understanding multivariable control; Improving a safety instrumented system; 2017 Engineers' Choice Award Winners
Selecting the best controller from several viewpoints; System integrator advice for the IIoT; TSN and real-time Ethernet; Questions to ask when selecting a VFD; Action items for an aging PLC/DCS
Robot advances in connectivity, collaboration, and programming; Advanced process control; Industrial wireless developments; Multiplatform system integration
Motion control advances and solutions can help with machine control, automated control on assembly lines, integration of robotics and automation, and machine safety.
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Future of oil and gas projects; Reservoir models; The importance of SCADA to oil and gas
Big Data and bigger solutions; Tablet technologies; SCADA developments
SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.

(copy 5)

click me