Engineers as Employees and Managers-2.ppt
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1、Engineers as Employees and Managers-2,Observation on the loss of the Challenger Critical and Uncritical Loyalty Responsible Organizational Disobedience,Observation on the loss of the Challenger,On the loss of the Challenger,Engineering processes (the decision-making process to arrive at the launch d
2、ecision) need continuous review. Learn to recognize when external pressures or conflicting interests (profits, prestige,) cause deviations from good engineering practice.,Challenger, contd.,Be wary of incrementally increasing risks by normalization of deviance. Learn to recognize, and be especially
3、cautious in the operation of, tightly coupled and complexly interactive engineering systems. Learn to differentiate between Primary Engineering Decisions (PED) and Primary Management Decisions (PMD),Normalization of Deviance,1977 tests indicated some joint opening, contrary to joint designers expect
4、ationsa sealing putty “fix” was added, and the anomaly was considered an “acceptable risk” 1981 launch resulted in blow-by through the putty this anomaly was explained as a result of improperly applied putty 1984 and 1985 launches caused more leakage leakage had come to be expected,Normalization of
5、Deviance,If the initial seal designers were asked whether any leakage through the seal was acceptable, they probably would have not accepted any leakage. Every instance of gas blow-by was contrary to the initial seal designers expectations and, yet came to be acceptable, almost expected. A “fix”, no
6、t a redesign, was always the remedy. Deviations from initially expected behavior should always be reexamined very carefully.,Tightly coupled & complexly interactive systems,Processes are said to be tightly coupled when one process can rapidly affect another process. Processes are said to be complexl
7、y interactive when they interact in unanticipated ways. Risk is more difficult to estimate in tightly coupled and complexly interactive processes. The solid booster seals and the shuttle fuel storage/delivery system are an example of a tightly coupled and complexly interactive system.,The effects of
8、 low ambient temperature,The low ambient temperature was a concern during launch review The critical interaction between low temperature and seal behavior was not foreseen (tightly coupled and complexly interactive) Launch was approved in spite of the concerns because no data existed to confirm a ha
9、zard. (No data existed to confirm the safety-review the purpose of the pre-launch engineering process!),Critical loyalty vs. Uncritical loyalty,Critical loyalty,True loyalty (by an employee to an employer) should include “critical” loyalty. Critical loyalty implies that an employee has a right (and
10、responsibility) to (internally) criticize actions by the employer when there is a sincere belief that the action is detrimental to the interests of the employer, or harmful to others (employees or public).,Critical loyalty,Unfortunately, sometimes critical loyalty is interpreted as disloyalty, and r
11、esults in disciplinary action This is not conducive to an environment where future critical loyalty is welcomed,Uncritical loyalty,Uncritical (blind) loyalty is sometimes expected by employers. Uncritical loyalty implies that the employee supports (actively or passively) all actions by the employer.
12、 (see good arguments against uncritical loyalty in Harris, et al. sec. 8.7),Organizational Disobedience,Organizational Disobedience,Disobedience by contrary action A Ford engineer who lobbies (as an individual) in favor of EPA fuel efficiency regulations which Ford opposes on a corporate level Disob
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