eSafety Compendium

4.4 System controls should be designedsuch that they can be operated withoutadverse impact on the primary drivingtask.4.5 The driver should be able to controlthe pace of interaction with the system4.6 The system should not require thedriver to make time-critical responseswhen providing input to the system.4.7 The driver should be able to resumean interrupted sequence of manual/visualinteractions with the system at the pointof interruption or at another logical point.4.8 The driver should have control ofauditory information where there is alikelihood of distraction or irritation4.9 The system’s response (e.g. feedback,confirmation) following driver inputshould be timely and clearly perceptible.4.10 Systems providing non-safety-relateddynamic visual information should becapable of being switched into a modewhere that information is not provided tothe driver.5. System Behaviour PrinciplesCan you use allsystem controlsand still maintainfull control ofsteering wheel,pedals and otherimportantcontrols?Can you interactwith the system atyour own pace?Can you delay asystem requestedinput till trafficsituation permits?Can you resumean interruptedsequence whereyou left oranother logicalpoint ?Can you adjust thelevel of thesound(s)produced by thesystem?Do youimmediately knowif the system isreacting to yourinput?Does the systemhave a functionwhereby you canswitch to a modesuitable fordriving (if it hasgot non-suitablefunctions)?Yes/No by expert check(bad example: rotary system controlon steering wheel with concentricaxis; or: frequently used controls arehard to reach)Expert check, whether driver canretrieve information when he needsit.(In discussion in ISO/TC22/SC13/WG8 (dialogue design principles))expert check(4.6 is special case of 4.5, principlesmay be combined)expert check whether system statechanges during interruption(In discussion inISO/TC22/SC13/WG8)Yes/no, (in ISO 15006)ISO15005: measure system responsetime and check, whether it is shorterthan 250msExpert checkPage 312 of 490