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<h2 class="hd hd-2 unit-title">The Curse of Software</h2>
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<h2>7.3.1 The Curse of Software</h2>
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<p>In today's age of information, software plays an indispensable role in many engineering systems. However, software can also contribute to system failures. But what do we mean when we say "software failure"? Actually, software itself is not the problem. In fact, the "curse of software" is that it always does exactly what it is told to do. To understand the role of software in accidents, it is important to consider software in the context of its interactions with other components and with human operators. </p>
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<h2 class="hd hd-2 unit-title">Software Redundancy</h2>
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<h2>7.3.2 Software Redundancy</h2>
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<p>We've previously discussed how hardware redundancy is a strategy that is often used to mitigate the consequences of component failure. In software, however, redundancy is quite a different issue and can add a lot of complexity to the system. In the next video, Prof. Hoffman and Dr. Thomas discuss two examples of software redundancy in spaceflight --- onboard the Ariane 5 launch vehicle and the Space Shuttle --- and examine the implications of redundancy for each system.</p>
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<h2>7.3.3 Software in Aviation</h2>
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<p>In the previous video, we looked at two cases in which software contributed to safety issues in astronautics. Next, we will see how software --- and its interactions with hardware and humans --- has also played a role in aviation accidents. Again, the curse of software strikes: software did exactly was it was designed to do, but it wasn't designed for all possible operating conditions. Pay attention to how Prof. Hoffman and Dr. Thomas analyze the influence of multiple contributing factors in each accident; we will expect you to do the same in your Aircraft Accident Report.</p>
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<h3 class="hd hd-2">Video: Software in Aviation</h3>
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