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Mobile Interaction with Safety Critical Systems: A feasibility study
Mälardalen University, School of Innovation, Design and Engineering.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Embedded systems exists everywhere around us and the number of applications seems to be ever

growing. They are found in electrical devices from coee machines to aircrafts. The common

denominator is that they are designed for the specic purpose of the application. Some of them are

used in safety critical systems where it is crucial that they operate correct and as intended in order

to avoid accidents that can harm humans or properties. Meanwhile, general purpose Commercial

O The Shelf (COTS) devices that can be found in the retail store, such as smartphones and tablets,

has become a natural part of everyday life in the society. New applications are developed every day

that improves everyday living, but numerous are also coupled to specic devices in order to control

its functionality. Interaction between embedded systems and the exible devices do however not

come without issues. Security, safety and ethical aspects are some of the issues that should be


In this thesis, a case study was performed to investigate the feasibility of using mobile COTS

products in interaction with safety critical systems with respect to functional safety. Six user

scenarios were identied for investigation, which could be of interest for industrial applications;

The operator presented live machine data, The operator controlling the machine remotely, The

service technician using mobile device in maintenance, service technician reading machine logs

from the oce, the production manager analyzing machine productivity logs from the oce and the

software manager uploading software. Restrictions in the functional safety standard, IEC 61508,

and the characteristics of COTS devices, leads to the conclusion that real time interaction with

safety systems is not allowed if the certication is to be preserved. Extracting information used

to analyze the system where data is only sent from the machine would be allowed. All scenarios

where the machine sends data to the user, and the data is only used as information, are hence

allowed if isolation properties are guaranteed. A prototype system was designed and parts of it were

implemented to show how sending and logging information can be performed using the company

developed communication platform Data Engine.

Place, publisher, year, edition, pages
2015. , 50 p.
Keyword [en]
Safety Critical Systems, COTS interaction
National Category
Embedded Systems
URN: urn:nbn:se:mdh:diva-29820OAI: diva2:875079
External cooperation
maximatecc AB
Subject / course
Computer Science
Available from: 2015-12-07 Created: 2015-11-30 Last updated: 2015-12-07Bibliographically approved

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Jonsson, Erik
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