1 ME Spring 2015 Systems Engineering, Part II Session 9 10 February 2015 Mr. Larry Hopp, CPL © Copyright 2013
2 Agenda Discuss Usability Ch. 14
3 Design for Usability Human System Integration –Interfaces between the human and the system –Important aspect of the design process Design against misuse and abuse Safety and Security Air Force Human System Integration, Army Manpower and Personnel Integration (MANPRINT), Navy, FAA, and NASA MIL-STD 1472G.
4 Definition and Explanation of Human Systems Integration Human element of the system and the interface between the human being, the machine, the facilities, and associated hardware. Objective –Assure complete compatibility between the system physical and functional design features and the human element in the operation, maintenance and support of the system.
Copyright ©2011, ©2006, ©1998 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Systems Engineering and Analysis, Fifth Edition Benjamin S. Blanchard Wolter J. Fabrycky Figure 4.4 The evolution of hardware, software, and human requirements from the functional analysis (refer to Figure 2.4).
Copyright ©2011, ©2006, ©1998 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Systems Engineering and Analysis, Fifth Edition Benjamin S. Blanchard Wolter J. Fabrycky Figure 14.1 Human factors requirements.
7 Anthropometric Factors What are anthropometric factors? Why do they matter in design? Static/Dynamic
Copyright ©2011, ©2006, ©1998 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Systems Engineering and Analysis, Fifth Edition Benjamin S. Blanchard Wolter J. Fabrycky Figure 14.2 Anthropometric data—standing body dimensions.
Copyright ©2011, ©2006, ©1998 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Systems Engineering and Analysis, Fifth Edition Benjamin S. Blanchard Wolter J. Fabrycky Figure 14.3 Anthropometric data—seated body dimensions.
Copyright ©2011, ©2006, ©1998 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Systems Engineering and Analysis, Fifth Edition Benjamin S. Blanchard Wolter J. Fabrycky Figure 14.4 Suggested parameters for standard operator workplaces. Source: H.P.Van Cott and R.G.Kinkade, Human Engineering Guide to Equipment Design,revised ed. (Washington, DC:U.S.Government Printing Office,1972).
Copyright ©2011, ©2006, ©1998 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Systems Engineering and Analysis, Fifth Edition Benjamin S. Blanchard Wolter J. Fabrycky Figure 14.5 Anthropometric data pertaining to work space requirements. Source: NAV-SHIPS 94324, Maintainability Design Criteria Handbook for Designers of Shipboard Electronics Equipment (Washington, DC: Naval Ship Systems Command, U.S. Navy, 1964).
Copyright ©2011, ©2006, ©1998 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Systems Engineering and Analysis, Fifth Edition Benjamin S. Blanchard Wolter J. Fabrycky Figure 14.6 Vertical and horizontal visual field.
Copyright ©2011, ©2006, ©1998 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Systems Engineering and Analysis, Fifth Edition Benjamin S. Blanchard Wolter J. Fabrycky Figure 14.7 Approximate limits of color differentiation.
Copyright ©2011, ©2006, ©1998 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Systems Engineering and Analysis, Fifth Edition Benjamin S. Blanchard Wolter J. Fabrycky
Copyright ©2011, ©2006, ©1998 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Systems Engineering and Analysis, Fifth Edition Benjamin S. Blanchard Wolter J. Fabrycky TABLE 14.1 Specific Task Illumination Requirements
16 Human Sensory Factors Hearing –Oral communication –Noise Distractor and deterrent for efficiency Discomfort or pain above 130db. –Best hearing range is 50 – 80 DB
17 Physiological Factors Environmental stress –Temperature Comfort zone is 55 – 75 degrees –Humidity –Vibration –Noise
18 Psychological Factors Human mind –Emotions –Influenced by physiological factors.
Copyright ©2011, ©2006, ©1998 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Systems Engineering and Analysis, Fifth Edition Benjamin S. Blanchard Wolter J. Fabrycky Figure 14.8 The human information-processing subsystem (simplified).
20 Measures in Human Factors Effective –Operational and maintenance functionality, missions Accomplishments Efficient –Minimum Life Cycle Cost –Cost with respect to performance –Errors per mission performance factor per cost
Copyright ©2011, ©2006, ©1998 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Systems Engineering and Analysis, Fifth Edition Benjamin S. Blanchard Wolter J. Fabrycky Figure 14.9 Human factors in the system life cycle.
22 System Requirements for Human Factors Quantitative Requirements –Age –Education –Reading level –Experience –Size
23 Design Review and Evaluation What are some of the human factors considerations in a design review?
24 Operator Task Analysis (OTA) Six steps –Operator functions –Information for operator personnel decisions –Feedback to human –Time requirements, frequency, accuracy, and criticality
25 Operational Sequence Diagram (OSD) Graphic representation of operator tasks Sequence of tasks
26 Error Analysis Types of errors –Omission –Commision
27 Chapter 14 Thursday 12 February –Homework Chapter 13 Problems 2, 5 a-e, 12, 14, 23 Tuesday 17 February –CP 2 Maintainability