(PDF) Designing for Human-Computer Interaction

Added on - 29 Nov 2019

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Design Problem in Human Computer Interaction.AbstractHuman factor is important in the functioning of the software device or thehardware system and every stage of human interaction has a direct relation to the properfunctioning of the system. Wrong inputs and mishandling can lead to serious disastersrather than enabling the automated computation. Very often we get the examples of humaninteraction failure and the disasters that happen due to it.The Human interaction conceptThe efficiency of a software depends upon it data retention capacity, right input,timely human interface, memorability of the software and data retrieval and readingcapacity. The accuracy and precision are the USPs on which the performance depends. Anymismatch between the users’ intention and the derived signals or the attained purpose willnot only lead to an anomaly but a disaster. We give an example to illustrate.The top human factors in design which can face these disasters are alarm of factory or mineor fire, control rooms, pilot’s cockpit, ergonomics and general failure.In Japan the evolution of audio frequency track circuit enables controlling the trainsignal via radio-waves. This system generally showed a stable operation enabling the train totrack a radio wave signal and pass through label crossing. But the monitoring of the controlroom depends on human interface where the checking of signals and the label crossing ismonitored and manipulated by human interface. Because of lack of human interface amajor accident occurred and thousands of lives paid the casualty cost. The loss of livescaused the irrecoverable loss and a phobia among passengers which lurked for long time1.The disaster can be avoided by following the train control system prevalent in manycountries through the Unified Train control system where the user interface is the minimumand there is an automated block function in case of any many mal-signalling. The basis ofthese assured system are interlocking functions and block functions. These helps preventtrain-to-train and near end collisions. Morbid lessons from the past has helped with themodernization of introducing block and interlocking of the system so that accidents can beavoided and precious lives saved2.1Available at: https://www.crcpress.com/Human-Computer-Interaction-Design-Issues-Solutions-and-Applications/Sea [Accessed 10 Sep. 2017]]2Available at: https://www.crcpress.com/Human-Computer-Interaction-Design-Issues-Solutions-and-Applications/Sea [Accessed 10 Sep. 2017]
The development of the modern automated signaling has put to use the following aspectsof design analysis:These are the software analysis, the basic human interface evaluation with its flawsand failures, the time gap analysis between incident and operation, heuristic evaluations,trials and usability tests, understanding the user need to fit it with the design concept,understanding user operational capabilities, the complexity of the problem and the userinterface and narrowing the bridge between the expected result and the outcome result.From all this the UTS process of control for the train has emerged. In UTS system thehierarchical train control processor is located at the center and has interlocking and logicalprocessing devices. The ATP and the system together help in the formation of the blockfunctional layer. Functions like train tracking are included with a simple logical circuitworking. The below picture give a picture of the type of workflow.3Available at: https://www.cs.cmu.edu/~bam/uicourse/special/ [Accessed 10 Sep. 2017]
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