0
00:00:01,000 --> 00:00:03,980
我们来看这个用例规约怎么写

1
00:00:06,940 --> 00:00:09,060
就按照我们前面讲的

2
00:00:11,380 --> 00:00:13,210
那些内容来写嘛

3
00:00:13,500 --> 00:00:14,680
执行者

4
00:00:15,330 --> 00:00:16,952
这个主，这几个辅

5
00:00:16,952 --> 00:00:21,819
那这个就跟前面的那个系统用例图是对应的了

6
00:00:21,819 --> 00:00:22,282
对吧

7
00:00:22,282 --> 00:00:23,441
这是照抄的

8
00:00:23,441 --> 00:00:24,600
下面就是要

9
00:00:25,550 --> 00:00:27,870
自己加上去的，前置条件

10
00:00:28,150 --> 00:00:29,245
后置条件

11
00:00:29,245 --> 00:00:30,340
前置条件

12
00:00:32,000 --> 00:00:33,941
是一个背景条件

13
00:00:33,941 --> 00:00:34,670
就是说

14
00:00:35,140 --> 00:00:39,400
即使目前蒸馏水这个用例没有在运行

15
00:00:40,510 --> 00:00:43,441
这个条件依然可以检测，哪一个

16
00:00:43,441 --> 00:00:44,070
就这个

17
00:00:46,210 --> 00:00:47,240
背景条件

18
00:00:47,700 --> 00:00:48,290

19
00:00:48,640 --> 00:00:50,630
后置条件，就是

20
00:00:50,910 --> 00:00:52,100
这个用例

21
00:00:53,130 --> 00:00:54,690
要算成功

22
00:00:56,090 --> 00:00:58,760
那应该是处于什么状态下，这个系统

23
00:01:00,560 --> 00:01:02,010
这是后置条件

24
00:01:05,080 --> 00:01:06,440
再往下走

25
00:01:08,190 --> 00:01:09,630
就是涉众利益了

26
00:01:12,480 --> 00:01:13,740
这是

27
00:01:15,940 --> 00:01:17,830
相当于什么，上游

28
00:01:18,550 --> 00:01:19,615
这是执行者

29
00:01:19,615 --> 00:01:21,924
这个操作的村民是执行者

30
00:01:21,924 --> 00:01:22,280

31
00:01:22,860 --> 00:01:24,360
村长

32
00:01:26,340 --> 00:01:28,323
这是一个比较大的涉众

33
00:01:28,323 --> 00:01:31,100
但他自己可能不一定操作的

34
00:01:31,390 --> 00:01:33,130
还有热源厂商

35
00:01:34,590 --> 00:01:34,833

36
00:01:34,833 --> 00:01:36,780
这可以看作是下游

37
00:01:37,900 --> 00:01:40,120
或者是这个

38
00:01:40,400 --> 00:01:41,523
信息的主人

39
00:01:41,523 --> 00:01:43,320
因为你用的热源

40
00:01:44,470 --> 00:01:47,440
如果说，我们这个系统故意歧视他的热源

41
00:01:49,610 --> 00:01:52,590
故意，后面在这个设计上

42
00:01:53,030 --> 00:01:54,610
针对某种热源

43
00:01:54,610 --> 00:01:56,190
我就故意搞得

44
00:01:56,190 --> 00:01:57,770
故意不好好做

45
00:01:58,120 --> 00:01:59,990
那不把那个厂家给坑了吗

46
00:01:59,990 --> 00:02:00,500
对不对

47
00:02:00,780 --> 00:02:02,280
还有，我故意

48
00:02:02,730 --> 00:02:06,060
我们系统故意去坑这个水分配系统

49
00:02:08,040 --> 00:02:09,390
把它搞坏

50
00:02:11,120 --> 00:02:12,930
那后面这些人怎么样

51
00:02:13,660 --> 00:02:15,290
他也不高兴

52
00:02:18,420 --> 00:02:20,550
他的利益也会受到损害

53
00:02:23,760 --> 00:02:24,636
涉众利益

54
00:02:24,636 --> 00:02:26,390
那我们看，基本路径

55
00:02:26,980 --> 00:02:30,920
接通水源，调节流量

56
00:02:31,350 --> 00:02:35,420
这跟我们那个前面的活动图

57
00:02:35,700 --> 00:02:37,490
是类似的

58
00:02:37,860 --> 00:02:40,440
只不过把活动图里面的步骤搬到这里来

59
00:02:41,460 --> 00:02:44,364
那我们加了一些后面这个

60
00:02:44,364 --> 00:02:45,720
请求水分配系统接受净水

61
00:02:46,000 --> 00:02:46,720

62
00:02:47,410 --> 00:02:49,560
判断要排空残渣

63
00:02:49,890 --> 00:02:51,330
这是基本路径

64
00:02:52,880 --> 00:02:54,972
扩展路径就是有意外的

65
00:02:54,972 --> 00:02:55,600
比如说

66
00:02:56,830 --> 00:02:58,300
要是没达到呢

67
00:02:58,300 --> 00:02:59,525
显然没达到

68
00:02:59,525 --> 00:02:59,770
是

69
00:03:01,750 --> 00:03:03,481
发生了很多的，对吧

70
00:03:03,481 --> 00:03:04,131
没达到

71
00:03:04,131 --> 00:03:05,430
就直接转到7

72
00:03:05,840 --> 00:03:07,816
如果没达到需要排空

73
00:03:07,816 --> 00:03:10,232
那就当前循环就结束了

74
00:03:10,232 --> 00:03:11,550
就下一个循环

75
00:03:12,310 --> 00:03:13,230
这是

76
00:03:13,510 --> 00:03:17,640
扩展路径的条件，这是做法

77
00:03:20,580 --> 00:03:21,710
字段列表

78
00:03:22,640 --> 00:03:24,471
就是这个地方

79
00:03:24,471 --> 00:03:25,780
一个转换的

80
00:03:27,000 --> 00:03:28,690
输入是污水、热

81
00:03:29,630 --> 00:03:32,580
输出，净水、残渣

82
00:03:32,860 --> 00:03:35,130
那么这跟我们前面那个

83
00:03:36,880 --> 00:03:38,520
画的那个活动图

84
00:03:38,830 --> 00:03:40,948
那个输入输出是一样的

85
00:03:40,948 --> 00:03:42,220
就照抄就可以

86
00:03:42,620 --> 00:03:43,810
照搬就可以

87
00:03:44,570 --> 00:03:46,836
那这里有一个业务规则

88
00:03:46,836 --> 00:03:48,650
什么叫足够分配值

89
00:03:49,010 --> 00:03:51,550
什么叫需要排空值

90
00:03:52,660 --> 00:03:53,963
如果比较复杂

91
00:03:53,963 --> 00:03:57,440
比如说，你这个值可能是根据你的这个

92
00:03:59,560 --> 00:04:01,500
蒸馏器的大小

93
00:04:02,510 --> 00:04:06,910
还有呢，你的那个水分配系统的管道的粗细

94
00:04:07,190 --> 00:04:07,910
对吧

95
00:04:08,190 --> 00:04:11,230
还有那进水的什么粗细什么之类的

96
00:04:12,350 --> 00:04:14,088
它可能有规格

97
00:04:14,088 --> 00:04:15,081
有个表格

98
00:04:15,081 --> 00:04:16,820
如果是这么大的

99
00:04:17,620 --> 00:04:18,780
那应该是

100
00:04:19,060 --> 00:04:19,470
多少

101
00:04:19,470 --> 00:04:20,908
如果是这么大的

102
00:04:20,908 --> 00:04:21,935
应该多少

103
00:04:21,935 --> 00:04:24,400
残渣也是一样的

104
00:04:25,590 --> 00:04:25,804

105
00:04:25,804 --> 00:04:27,730
可能跟很多因素有关

106
00:04:28,210 --> 00:04:29,870
如果在这里放不下

107
00:04:29,870 --> 00:04:32,360
你就可以，参见某某某文档的

108
00:04:34,970 --> 00:04:37,530
里面的某某表格这样写

109
00:04:41,040 --> 00:04:43,010
质量需求，就是

110
00:04:43,290 --> 00:04:47,301
包括速度、容量等等

111
00:04:47,301 --> 00:04:49,490
这个就是做到多好

112
00:04:49,860 --> 00:04:54,420
那我们可以，比如，平均每小时能处理多少污水

113
00:04:55,340 --> 00:04:58,123
这个相当于速度

114
00:04:58,123 --> 00:04:58,551
要快

115
00:04:58,551 --> 00:04:58,980
对吧

116
00:04:58,980 --> 00:05:01,335
不能说一天处理一公斤

117
00:05:01,335 --> 00:05:02,620
那不是瞎搞吗

118
00:05:03,130 --> 00:05:04,800
还有呢，这个纯度

119
00:05:06,630 --> 00:05:08,720
你出来这个水质量怎么样

120
00:05:09,000 --> 00:05:09,660
对吧

121
00:05:13,200 --> 00:05:14,500
这是质量需求

122
00:05:15,310 --> 00:05:16,360
设计约束

123
00:05:16,360 --> 00:05:18,670
无，没有，你爱怎么做怎么做

124
00:05:18,670 --> 00:05:19,930
如果说有

125
00:05:19,930 --> 00:05:21,190
你可以怎么加

126
00:05:21,190 --> 00:05:21,820
比如说

127
00:05:22,310 --> 00:05:22,930

128
00:05:23,210 --> 00:05:24,760
涉众要求

129
00:05:25,930 --> 00:05:28,480
一定要用某某品牌的热源

130
00:05:28,990 --> 00:05:30,300
否则不给钱

131
00:05:32,680 --> 00:05:33,990
那这里要写

132
00:05:34,270 --> 00:05:36,760
必须要用某某品牌的热源

133
00:05:37,790 --> 00:05:39,550
但是必须来自什么

134
00:05:39,830 --> 00:05:42,220
来自涉众的要求

135
00:05:43,320 --> 00:05:45,597
包括这个厂家的

136
00:05:45,597 --> 00:05:48,200
包括那个什么那个

137
00:05:48,500 --> 00:05:51,252
公益团体的

138
00:05:51,252 --> 00:05:52,972
包括村民的

139
00:05:52,972 --> 00:05:53,660
对吧

140
00:05:53,940 --> 00:05:55,440
比如说，村民就是说

141
00:05:56,040 --> 00:05:59,420
我们这边就是流行某某热源，那个便宜

142
00:05:59,810 --> 00:06:02,820
而且是对方厂家免费赠送的

143
00:06:03,150 --> 00:06:05,815
那就要求你一定要用这个热源

144
00:06:05,815 --> 00:06:07,720
否则你这个系统就

145
00:06:08,890 --> 00:06:09,530

146
00:06:09,810 --> 00:06:11,520
不适合他的需要

147
00:06:14,390 --> 00:06:15,520
设计约束

148
00:06:16,070 --> 00:06:17,613
一定是来自涉众的

149
00:06:17,613 --> 00:06:19,350
不能来自我们自己

150
00:06:21,300 --> 00:06:22,011
不能来自

151
00:06:22,011 --> 00:06:25,568
设计这个东西的设计团队

152
00:06:25,568 --> 00:06:27,939
设计团队是不存在的

153
00:06:27,939 --> 00:06:31,970
我们前面讲愿景的时候也说嘛

154
00:06:32,390 --> 00:06:33,570

155
00:06:34,090 --> 00:06:35,990
我们做需求的时候

156
00:06:35,990 --> 00:06:36,750
要把这个

157
00:06:37,270 --> 00:06:39,610
研发团队看作是死人

158
00:06:40,380 --> 00:06:41,725
这系统谁做的

159
00:06:41,725 --> 00:06:43,070
外星人做的

160
00:06:43,480 --> 00:06:46,950
我们只需要提需求，功能、性能，就行了

161
00:06:47,390 --> 00:06:49,950
剩下的外星人帮我们搞定

162
00:06:51,210 --> 00:06:52,608
那用例规约

163
00:06:52,608 --> 00:06:53,540
就这样来

164
00:06:55,540 --> 00:06:56,380
这样来写