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diff --git a/usth/ICT2.7/P2L1 Requirements Engineering Subtitles/6 - Identifying Purpose - lang_en_vs4.srt b/usth/ICT2.7/P2L1 Requirements Engineering Subtitles/6 - Identifying Purpose - lang_en_vs4.srt deleted file mode 100644 index 0accc39..0000000 --- a/usth/ICT2.7/P2L1 Requirements Engineering Subtitles/6 - Identifying Purpose - lang_en_vs4.srt +++ /dev/null @@ -1,107 +0,0 @@ -1 -00:00:00,050 --> 00:00:03,480 -And identifying the purpose of a softer system means - -2 -00:00:03,480 --> 00:00:06,980 -defining the requirements for the system. And if you have - -3 -00:00:06,980 --> 00:00:09,540 -ever done anything like that, for example, we did - -4 -00:00:09,540 --> 00:00:12,060 -it for the first project in the previous mini course, - -5 -00:00:12,060 --> 00:00:14,720 -you will know that it is an extremely hard - -6 -00:00:14,720 --> 00:00:17,760 -task. Identifying the purpose of the software and defining its - -7 -00:00:17,760 --> 00:00:21,600 -requirements is very, very hard. Why is it so hard? - -8 -00:00:21,600 --> 00:00:25,560 -First of all, the purpose of most systems is inherently, - -9 -00:00:25,560 --> 00:00:27,920 -extremely complex, so this has to do with the - -10 -00:00:27,920 --> 00:00:31,330 -sheer complexity of the purpose of the requirements. Just think - -11 -00:00:31,330 --> 00:00:34,810 -of how complex is the functionality provided by most systems. - -12 -00:00:34,810 --> 00:00:38,790 -Second, it is hard, very hard to extract from humans - -13 -00:00:38,790 --> 00:00:41,780 -this purpose and make it explicit. So, paraphrasing a - -14 -00:00:41,780 --> 00:00:45,130 -famous quote from the late Steve Jobs, often people don't - -15 -00:00:45,130 --> 00:00:47,475 -know what they want until you show it to them. - -16 -00:00:47,475 --> 00:00:50,490 -It's hard to figure out what people really want. Third, - -17 -00:00:50,490 --> 00:00:54,260 -requirements often change over time. Customers change their - -18 -00:00:54,260 --> 00:00:57,490 -mind. Designing and building a system raises new requirements. - -19 -00:00:57,490 --> 00:01:00,270 -So for many reasons requirements tend not to - -20 -00:01:00,270 --> 00:01:02,760 -be stable, tend to evolve. And that, of course, - -21 -00:01:02,760 --> 00:01:05,440 -makes it harder to collect them. Finally, for - -22 -00:01:05,440 --> 00:01:09,600 -any realistic system, there are many stakeholders and they - -23 -00:01:09,600 --> 00:01:12,990 -often have conflicting goals and requirements. And it - -24 -00:01:12,990 --> 00:01:15,900 -can be very hard to reconcile the possibly conflicting - -25 -00:01:15,900 --> 00:01:19,630 -requirements that might emerge in these cases. So for all these reasons, - -26 -00:01:19,630 --> 00:01:21,230 -it is very, very difficult to - -27 -00:01:21,230 --> 00:01:23,930 -perform requirements engineering in an effective way. |