= ergonomics
tarix 07.04.2018 ölçüsü 458 b. #47126
= ergonomics WWII based – military significance… … a necessary part of medical device design… Application of the scientific knowledge of human capabilities and limitations to the design of systems and equipment to produce products with the most efficient, safe, effective, and reliable operation Application of the scientific knowledge of human capabilities and limitations to the design of systems and equipment to produce products with the most efficient, safe, effective, and reliable operation Interface points Interface points Environment Skill level of user Interaction between: Human element Hardware element Software element Memory Memory Visual perception Dialogue construction Individual skill level Individual sophistication Using 5% female to 95% male reach data, design an anesthesia machine layout…. Using 5% female to 95% male reach data, design an anesthesia machine layout…. What constraints does this put on the design? What % overall of the population would be served? Analytic process that focuses on device objectives Analytic process that focuses on device objectives Design and development process that converts results of analyses into detailed equipment features Test and evaluation process which verifies that development process satisfies constraints Planning Planning Analysis Conduct user studies Observations Interviews Focus groups Task analysis Benchmark usability tests User profile Setup advisory panel Should reflect system and personnel safety factors Should reflect system and personnel safety factors Failures Fail safe Failure indications Standards- ANSI, AAMI, ISO Written to meet needs of various target populations Study capability and information needs of documentation users Mental abilities Physical abilities Previous experience Understanding of general operation Special needs of environment Science of measuring human body and its parts and functional capacities Range of values: 5th percentile female to 95th percentile male Functional dimensions Psychological elements Workstation design considerations Labels should be clear and direct Labels should be clear and direct Controls, displays, and other equipment that must be located should be clearly marked Receptacles and connectors should be marked with intended function or connection Hazard warnings should be prominent Every user input should consistently produce some perceptible response from the computer Every user input should consistently produce some perceptible response from the computer Log-on should be automatically completed before any operation Allow for orderly shutdown in case of failure Consistent data entry transactions Consistent data entry transactions Minimize user input actions Ability to change entry after it has been added Present status, information, confirmation, and verification throughout the interaction Present status, information, confirmation, and verification throughout the interaction Standby should be accompanied by ‘WAIT’ message Feedback should be self-explanatory Commands, error messages , system capabilities, and procedures should be explained with prompts or help instructions Commands, error messages, system capabilities, and procedures should be explained with prompts or help instructions Missing data/aborting changes should be prompted Factual and informative dialogue Displayed in standardized area Currently defined default values should be provides and automatically displayed User should be prompted for acceptance of defaults Users should be able to set their own default T = a + b log2 (D/W + 1) T = a + b log2 (D/W + 1) where T = the average time taken to complete the movement A = the start/stop time of the device B = the inherent speed of the device D = the distance from the starting point to the center of the target W = the width of the target measured along the axis of motion. Bigger buttons are better Edges/corners are easiest Pop-up menus are easier than pull-down Pies are better than boxes Dostları ilə paylaş:
