diff options
Diffstat (limited to 'usth/ICT2.7/P3L2 A Tale of Analysis and Design Subtitles/2 - Analyzing Requirements - lang_en.srt')
| -rw-r--r-- | usth/ICT2.7/P3L2 A Tale of Analysis and Design Subtitles/2 - Analyzing Requirements - lang_en.srt | 579 |
1 files changed, 0 insertions, 579 deletions
diff --git a/usth/ICT2.7/P3L2 A Tale of Analysis and Design Subtitles/2 - Analyzing Requirements - lang_en.srt b/usth/ICT2.7/P3L2 A Tale of Analysis and Design Subtitles/2 - Analyzing Requirements - lang_en.srt deleted file mode 100644 index 909fb2d..0000000 --- a/usth/ICT2.7/P3L2 A Tale of Analysis and Design Subtitles/2 - Analyzing Requirements - lang_en.srt +++ /dev/null @@ -1,579 +0,0 @@ -1 -00:00:00,220 --> 00:00:04,900 -Okay so let me start underlining these nouns, and I'll start - -2 -00:00:04,900 --> 00:00:07,810 -identifying the ones that are relevant, and I'll ask you some - -3 -00:00:07,810 --> 00:00:10,550 -questions or you can ask me questions if - -4 -00:00:10,550 --> 00:00:14,666 -you see something that doesn't make sense to you. Good enough. - -5 -00:00:14,666 --> 00:00:17,650 ->> okay, let's see, patron. It seems to - -6 -00:00:17,650 --> 00:00:19,670 -me that patron is definitely an important entity. - -7 -00:00:19,670 --> 00:00:20,808 ->> That's, that's what its all about. - -8 -00:00:20,808 --> 00:00:23,270 ->> Okay, all right, so actually, the way - -9 -00:00:23,270 --> 00:00:25,750 -I'm going to do this, I'm going to take all these relevant - -10 -00:00:25,750 --> 00:00:28,610 -entities and I'm going to start putting them into what I call a class - -11 -00:00:28,610 --> 00:00:32,450 -diagram. So you don't really need to know what that is exactly, but imagine - -12 -00:00:32,450 --> 00:00:37,150 -this being a, a diagram in which I'm drawing, I represent in all development - -13 -00:00:37,150 --> 00:00:42,260 -items as rectangles with a given name and, and then later on some attributes. - -14 -00:00:42,260 --> 00:00:42,660 ->> Okay. - -15 -00:00:42,660 --> 00:00:44,055 ->> Okay, and I'm, I'm just going to put - -16 -00:00:44,055 --> 00:00:45,600 -them there. So I'm going to start with patron. - -17 -00:00:45,600 --> 00:00:48,420 -I'm going to create one class for the - -18 -00:00:48,420 --> 00:00:50,250 -patron. I'm going to give it the name patron. - -19 -00:00:51,380 --> 00:00:54,120 -And by the way, assuming that you'd probably figure out, it's important that we - -20 -00:00:54,120 --> 00:00:57,430 -represent, we use the right names so that it's clear when we're looking at - -21 -00:00:57,430 --> 00:01:00,790 -the class diagram what we're referring to, so I'll just use the, the nouns - -22 -00:01:00,790 --> 00:01:06,520 -themselves as names. Okay, library card seems to be also a relevant element. - -23 -00:01:06,520 --> 00:01:08,072 ->> Every patron has a library card. - -24 -00:01:08,072 --> 00:01:09,530 ->> All right, perfect, so we'll just - -25 -00:01:09,530 --> 00:01:12,880 -create a library card here. And let's see. - -26 -00:01:12,880 --> 00:01:16,530 -As, as long as they're in the system. And I saw that there's a system - -27 -00:01:16,530 --> 00:01:19,000 -here, this concept of system, this concept - -28 -00:01:19,000 --> 00:01:22,076 -of library. And based on my experience, normally, - -29 -00:01:22,076 --> 00:01:26,574 -those are kind of in an overarching themes. So this is really what we are - -30 -00:01:26,574 --> 00:01:28,597 -modeling. So the only - -31 -00:01:28,597 --> 00:01:30,297 -thing that will make a difference is - -32 -00:01:30,297 --> 00:01:34,120 -if there were more than one library or more than one system. Is that the case? - -33 -00:01:34,120 --> 00:01:36,740 ->> We just want one system for our one library - -34 -00:01:36,740 --> 00:01:38,770 ->> Okay so, in this case I won't even represent - -35 -00:01:38,770 --> 00:01:41,540 -those because basically what I'm representing is the system and - -36 -00:01:41,540 --> 00:01:41,990 -the library. - -37 -00:01:41,990 --> 00:01:42,740 ->> I understand, I understand. - -38 -00:01:42,740 --> 00:01:44,420 - -39 -00:01:44,420 --> 00:01:48,350 -Okay and then, oh name, address and phone - -40 -00:01:48,350 --> 00:01:51,510 -number are interesting because these are important entities, - -41 -00:01:51,510 --> 00:01:53,180 -but this seems like, you know, they're not - -42 -00:01:53,180 --> 00:01:56,550 -entities in themselves, so they're more attributes - -43 -00:01:56,550 --> 00:01:58,070 -of something else. I would imagine that - -44 -00:01:58,070 --> 00:02:00,080 -this is the way you identify, or these - -45 -00:02:00,080 --> 00:02:01,860 -are elements that are important for the patron? - -46 -00:02:01,860 --> 00:02:04,880 ->> That's what we take down when we issue the cards. - -47 -00:02:04,880 --> 00:02:06,800 ->> Okay. Perfect. So, I'm going to - -48 -00:02:06,800 --> 00:02:09,710 -take those and make those attributes of the patron, which means - -49 -00:02:09,710 --> 00:02:12,350 -that I'm going to take the class that I created before, and I'm - -50 -00:02:12,350 --> 00:02:16,430 -just going to write them down here so that they're represented and, - -51 -00:02:16,430 --> 00:02:19,360 -and we know that these are kind of what characterizes the patron. - -52 -00:02:19,360 --> 00:02:20,070 ->> Gotcha. - -53 -00:02:20,070 --> 00:02:25,540 ->> Okay? And then, I guess similar consideration for the library - -54 -00:02:25,540 --> 00:02:28,750 -card number. So this is to be associated with the library card? - -55 -00:02:28,750 --> 00:02:29,902 ->> It's printed right on it. - -56 -00:02:29,902 --> 00:02:32,180 ->> All right, so we'll put this as - -57 -00:02:32,180 --> 00:02:38,130 -an attribute of the library card, then. And then, in addition, at any particular point - -58 -00:02:38,130 --> 00:02:43,630 -in time. Okay, so time seems to be a relevant entity right, - -59 -00:02:43,630 --> 00:02:47,880 -because time seems to occur several times in this description. For example, I - -60 -00:02:47,880 --> 00:02:53,940 -think you guys keep track of how long a book has been loaned, right? - -61 -00:02:53,940 --> 00:02:54,300 ->> Right. - -62 -00:02:54,300 --> 00:02:57,270 ->> And there's some time associated also here. - -63 -00:02:57,270 --> 00:02:58,380 ->> And a children's age. - -64 -00:02:58,380 --> 00:02:59,760 ->> Oh yeah. The children's age here that - -65 -00:02:59,760 --> 00:03:02,200 -I didn't see before. Yeah. So, what - -66 -00:03:02,200 --> 00:03:03,800 -I'm going to do, I'm going to represent this in - -67 -00:03:03,800 --> 00:03:05,520 -a sort of generic way, as a date. - -68 -00:03:05,520 --> 00:03:06,520 ->> Okay. - -69 -00:03:06,520 --> 00:03:08,380 ->> These are kind of, kind of classes, utility - -70 -00:03:08,380 --> 00:03:10,880 -classes we call them, that are normally in every system. - -71 -00:03:10,880 --> 00:03:10,970 ->> Okay. - -72 -00:03:10,970 --> 00:03:13,060 ->> So I'm just going to put it down here - -73 -00:03:13,060 --> 00:03:14,940 -as a utility class that will be used - -74 -00:03:14,940 --> 00:03:18,780 -by different elements in the diagram. Okay, so - -75 -00:03:18,780 --> 00:03:23,070 -I want to calculate the items. So the items also - -76 -00:03:23,070 --> 00:03:25,230 -I mean I for what I know about libraries they - -77 -00:03:25,230 --> 00:03:28,490 -seem to be pretty relevant elements, right? So these are all - -78 -00:03:28,490 --> 00:03:31,305 ->> This is what we check out, this is what we're for. - -79 -00:03:31,305 --> 00:03:34,459 ->> Okay, so then items definitely will become a - -80 -00:03:34,459 --> 00:03:37,349 -class, and then we have a due. Oh there's also - -81 -00:03:37,349 --> 00:03:39,730 -this concept of fines. I guess that seems to be - -82 -00:03:39,730 --> 00:03:42,330 -important. Right? You guys give fines to people who are late. - -83 -00:03:42,330 --> 00:03:42,700 ->> Right, right. - -84 -00:03:42,700 --> 00:03:49,160 ->> Right, collect fines and so on. So we create a fine class down here and - -85 -00:03:49,160 --> 00:03:54,150 -the children. So children are special customers, right? It's - -86 -00:03:55,240 --> 00:03:56,890 -their age makes a difference? Is that the way it works? - -87 -00:03:56,890 --> 00:03:58,950 ->> Right. They, they can only check out a few books. - -88 -00:03:58,950 --> 00:04:01,410 ->> Okay. So I'll create them a special - -89 -00:04:01,410 --> 00:04:03,170 -kind of case, a special kind of customer so - -90 -00:04:03,170 --> 00:04:06,000 -I just create here a class for children. And - -91 -00:04:06,000 --> 00:04:08,682 -I can see that they're categorized by their age. - -92 -00:04:08,682 --> 00:04:09,340 ->> Right. - -93 -00:04:09,340 --> 00:04:13,160 ->> So I'll just put the age here as an attribute of the child. - -94 -00:04:14,220 --> 00:04:15,712 -And, okay, so the next one is - -95 -00:04:15,712 --> 00:04:19,653 -restriction. And restriction is kind of tricky because just - -96 -00:04:19,653 --> 00:04:22,010 -to be sort of a general concept. I mean, - -97 -00:04:22,010 --> 00:04:24,915 -in a sense, all of those are restrictions, right? - -98 -00:04:24,915 --> 00:04:28,250 ->> Right, this is just another one of these requirements. - -99 -00:04:28,250 --> 00:04:31,180 ->> Oh, okay, so, so we don't need to represent it explicitly, right? - -100 -00:04:31,180 --> 00:04:31,430 ->> Right, right. - -101 -00:04:31,430 --> 00:04:34,390 ->> It's just telling us how the children, yeah, okay, right; this is - -102 -00:04:34,390 --> 00:04:39,151 -just another requirement, so I just won't consider that for now. And oh, - -103 -00:04:39,151 --> 00:04:43,444 -I see that these books and audio video materials, I guess these - -104 -00:04:43,444 --> 00:04:48,902 -are things that the patrons can check out, right? - -105 -00:04:48,902 --> 00:04:50,725 ->> Those are some of the items, right. - -106 -00:04:50,725 --> 00:04:53,770 ->> There are two - -107 -00:04:53,770 --> 00:04:56,380 -more down here, right? Reference books and magazines? - -108 -00:04:56,380 --> 00:04:57,990 ->> But, they can't be checked - -109 -00:04:57,990 --> 00:04:59,270 -out, but they're definitely in the library. - -110 -00:04:59,270 --> 00:05:01,338 ->> Okay, so then I'm going to represent all of those - -111 -00:05:01,338 --> 00:05:04,180 -actually, now. So, I'm going to have books, I'm going to have audio - -112 -00:05:04,180 --> 00:05:07,990 -video materials, reference books, and magazines. And - -113 -00:05:07,990 --> 00:05:12,150 -I'm just going to have those as classes. Then, - -114 -00:05:12,150 --> 00:05:14,060 -okay here we have week, and we - -115 -00:05:14,060 --> 00:05:16,630 -already represented this general concept of time, so - -116 -00:05:16,630 --> 00:05:23,270 -week will be represented by the date class as well. And oh, I see best sellers. - -117 -00:05:23,270 --> 00:05:27,520 -So best sellers are also, I guess, items that can be checked out, right? - -118 -00:05:27,520 --> 00:05:28,150 ->> Right. - -119 -00:05:28,150 --> 00:05:29,330 ->> Okay, so I'll - -120 -00:05:29,330 --> 00:05:32,900 -just represent those as a class as well and an additional item that - -121 -00:05:32,900 --> 00:05:38,480 -is relevant for the library. And the limit, this is also a time limit, right? - -122 -00:05:38,480 --> 00:05:39,150 ->> Right. - -123 -00:05:39,150 --> 00:05:41,500 ->> So it can also be represented with a, with a class. - -124 -00:05:43,860 --> 00:05:47,380 -Oh, here we have cents, and for cents, same consideration that made - -125 -00:05:47,380 --> 00:05:50,430 -for time. This is kind of the money, is a general concept - -126 -00:05:50,430 --> 00:05:54,240 -that in all currency, many, in many IT systems. So, I'm, I'm - -127 -00:05:54,240 --> 00:05:57,430 -going to just have a money class here, which is another utility class. - -128 -00:05:57,430 --> 00:05:57,740 ->> Okay - -129 -00:05:57,740 --> 00:06:04,000 ->> Okay, and, oh, here I have value, so value is a property. - -130 -00:06:04,000 --> 00:06:09,320 -Let me look again at the requirement. Oh, it's the value of the item. So value - -131 -00:06:09,320 --> 00:06:11,450 -I'm going to put in the item as an attribute. Okay? - -132 -00:06:11,450 --> 00:06:13,120 ->> Okay. That's how much it cost us. - -133 -00:06:13,120 --> 00:06:14,090 ->> Okay. Perfect. - -134 -00:06:14,090 --> 00:06:18,400 ->> Seems like we got them all. Right? Anything I forgot? - -135 -00:06:18,400 --> 00:06:19,640 ->> That looks like it. - -136 -00:06:19,640 --> 00:06:22,580 ->> Okay, so this one, what I'd like to do. We have a kind of - -137 -00:06:22,580 --> 00:06:26,890 -a first take, first cut at the class diagram. I'd like to kind of - -138 -00:06:26,890 --> 00:06:31,480 -move to that and go through the different classes with you. And I'll ask - -139 -00:06:31,480 --> 00:06:33,440 -you some questions again. And you can - -140 -00:06:33,440 --> 00:06:34,510 -tell me whether there is something that - -141 -00:06:34,510 --> 00:06:36,894 -jumps at you that's not right. And - -142 -00:06:36,894 --> 00:06:38,930 -then we're going to try to refine that. - -143 -00:06:38,930 --> 00:06:39,180 ->> Okay - -144 -00:06:39,180 --> 00:06:39,510 ->> Okay. - -145 -00:06:39,510 --> 00:06:39,800 ->> Sounds good. - |