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diff --git a/usth/ICT2.7/P2L1 Requirements Engineering Subtitles/15 - RE Definition Breakdown - lang_en_vs4.srt b/usth/ICT2.7/P2L1 Requirements Engineering Subtitles/15 - RE Definition Breakdown - lang_en_vs4.srt new file mode 100644 index 0000000..bcc06a5 --- /dev/null +++ b/usth/ICT2.7/P2L1 Requirements Engineering Subtitles/15 - RE Definition Breakdown - lang_en_vs4.srt @@ -0,0 +1,207 @@ +1 +00:00:00,130 --> 00:00:02,540 +But how can we do that? How can we identify the purpose + +2 +00:00:02,540 --> 00:00:06,080 +of the system and collect good requirements? To answer that question, let me + +3 +00:00:06,080 --> 00:00:07,800 +give you another definition of requirements + +4 +00:00:07,800 --> 00:00:09,590 +engineering. And this one is a classical + +5 +00:00:09,590 --> 00:00:13,010 +one, one that summarizes what we discussed so far, and then we can + +6 +00:00:13,010 --> 00:00:16,180 +use as some sort of reference. And it is a little long. + +7 +00:00:16,180 --> 00:00:18,710 +Definitely longer than the one that we saw at the beginning. But it's + +8 +00:00:18,710 --> 00:00:21,840 +an important one and it contains a lot of very relevant points. So, + +9 +00:00:21,840 --> 00:00:25,210 +we're going to go through it and highlight these points. So the definition says, + +10 +00:00:25,210 --> 00:00:28,970 +that the requirements engineering is a set of activities concerned + +11 +00:00:28,970 --> 00:00:32,990 +with identifying and communicating the purpose of a software intensive + +12 +00:00:32,990 --> 00:00:35,770 +system and the context in which it will be used. + +13 +00:00:35,770 --> 00:00:38,570 +And this is exactly what we said at the beginning. But + +14 +00:00:38,570 --> 00:00:40,940 +something we can highlight in here, is the fact that + +15 +00:00:40,940 --> 00:00:44,210 +we're talking about a set of activities. So, what that means + +16 +00:00:44,210 --> 00:00:46,800 +is that requirements engineering is not just a phase or + +17 +00:00:46,800 --> 00:00:51,050 +a stage. It also says that it's about identifying and communicating. + +18 +00:00:51,050 --> 00:00:53,720 +And what that is telling us is that communication is + +19 +00:00:53,720 --> 00:00:56,670 +as important as the analysis. So, it's important to be + +20 +00:00:56,670 --> 00:00:59,990 +able to communicate these requirements not only to collect them. + +21 +00:00:59,990 --> 00:01:02,018 +And we will discuss many reasons why that is the + +22 +00:01:02,018 --> 00:01:05,880 +case. It explicitly talks about purpose. So that allows me + +23 +00:01:05,880 --> 00:01:10,310 +to stress, once more, that quality means fitness-for-purpose. We cannot + +24 +00:01:10,310 --> 00:01:14,410 +say anything about quality unless we understand the purpose. And + +25 +00:01:14,410 --> 00:01:16,210 +the last thing I want to point out in this first + +26 +00:01:16,210 --> 00:01:18,420 +part of the definition is the use of the term + +27 +00:01:18,420 --> 00:01:21,060 +context. This is also something else that we mentioned at + +28 +00:01:21,060 --> 00:01:24,890 +the beginning, that designers, analysts, need to know how and + +29 +00:01:24,890 --> 00:01:28,015 +where the system will be used. Without this information, you + +30 +00:01:28,015 --> 00:01:30,455 +cannot really understand what the system should do and you + +31 +00:01:30,455 --> 00:01:33,280 +cannot really build the system. So now, let's continue and + +32 +00:01:33,280 --> 00:01:35,755 +read the second part of the definition that says, hence. + +33 +00:01:35,755 --> 00:01:41,550 +Requirements engineering acts as the bridge between the real-world needs of + +34 +00:01:41,550 --> 00:01:45,315 +users, customers, and other constituencies affected by a + +35 +00:01:45,315 --> 00:01:49,440 +software system and the capabilities and opportunities afforded + +36 +00:01:49,440 --> 00:01:52,870 +by software-intensive technologies. This is a long sentence, + +37 +00:01:52,870 --> 00:01:55,030 +but also here, we can point out a + +38 +00:01:55,030 --> 00:01:57,670 +few interesting and relevant points. Let me start + +39 +00:01:57,670 --> 00:02:00,612 +by highlighting two parts. Real-world needs, and the + +40 +00:02:00,612 --> 00:02:04,150 +capabilities, and opportunities. So, what are these two + +41 +00:02:04,150 --> 00:02:07,000 +parts telling us? They are telling us that requirements + +42 +00:02:07,000 --> 00:02:09,949 +are partly about what is needed, the real-world needs + +43 +00:02:09,949 --> 00:02:13,520 +of all these stakeholders. But they're also partly about what + +44 +00:02:13,520 --> 00:02:16,100 +is possible, what we can actually build. We need + +45 +00:02:16,100 --> 00:02:19,260 +to compromise between these two things. And, finally, I would + +46 +00:02:19,260 --> 00:02:23,000 +like to point out this term constituencies, which indicates + +47 +00:02:23,000 --> 00:02:26,220 +that we need to identify all of the stakeholders, not + +48 +00:02:26,220 --> 00:02:29,130 +just the customer and the users, so anybody who is + +49 +00:02:29,130 --> 00:02:32,040 +affected by a software system. It is very important to + +50 +00:02:32,040 --> 00:02:35,130 +consider all of these actors. Otherwise, again, + +51 +00:02:35,130 --> 00:02:37,530 +we'll be missing requirements, we'll be missing + +52 +00:02:37,530 --> 00:02:41,120 +part of the purpose of the system and we will build a suboptimal system. |