本文共 26431 字，大约阅读时间需要 88 分钟。

<!-- [if !mso]> <mce:style><!-- v/:* {behavior:url(#default#VML);} o/:* {behavior:url(#default#VML);} w/:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} --> <!-- [endif]--><!-- [if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves>false</w:TrackMoves> <w:TrackFormatting/> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF/> <w:LidThemeOther>EN-US</w:LidThemeOther> <w:LidThemeAsian>ZH-CN</w:LidThemeAsian> <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> <w:SplitPgBreakAndParaMark/> <w:DontVertAlignCellWithSp/> <w:DontBreakConstrainedForcedTables/> <w:DontVertAlignInTxbx/> <w:Word11KerningPairs/> <w:CachedColBalance/> <w:UseFELayout/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> <m:mathPr> <m:mathFont m:val="Cambria Math"/> <m:brkBin m:val="before"/> <m:brkBinSub m:val="&#45;-"/> <m:smallFrac m:val="off"/> <m:dispDef/> <m:lMargin m:val="0"/> <m:rMargin m:val="0"/> <m:defJc m:val="centerGroup"/> <m:wrapIndent m:val="1440"/> <m:intLim m:val="subSup"/> <m:naryLim m:val="undOvr"/> </m:mathPr></w:WordDocument> </xml><![endif]--><!-- [if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" DefUnhideWhenUsed="true" DefSemiHidden="true" DefQFormat="false" DefPriority="99" LatentStyleCount="267"> <w:LsdException Locked="false" Priority="0" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Normal"/> <w:LsdException Locked="false" Priority="9" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="heading 1"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 2"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 3"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 4"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 5"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 6"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 7"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 8"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 9"/> <w:LsdException Locked="false" Priority="39" Name="toc 1"/> <w:LsdException Locked="false" Priority="39" Name="toc 2"/> <w:LsdException Locked="false" Priority="39" Name="toc 3"/> <w:LsdException Locked="false" Priority="39" Name="toc 4"/> <w:LsdException Locked="false" Priority="39" Name="toc 5"/> <w:LsdException Locked="false" Priority="39" Name="toc 6"/> <w:LsdException Locked="false" Priority="39" Name="toc 7"/> <w:LsdException Locked="false" Priority="39" Name="toc 8"/> <w:LsdException Locked="false" Priority="39" Name="toc 9"/> <w:LsdException Locked="false" Priority="35" QFormat="true" Name="caption"/> <w:LsdException Locked="false" Priority="10" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Title"/> <w:LsdException Locked="false" Priority="1" Name="Default Paragraph Font"/> <w:LsdException Locked="false" Priority="11" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Subtitle"/> <w:LsdException Locked="false" Priority="22" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Strong"/> <w:LsdException Locked="false" Priority="20" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Emphasis"/> <w:LsdException Locked="false" Priority="59" SemiHidden="false" UnhideWhenUsed="false" Name="Table Grid"/> <w:LsdException Locked="false" UnhideWhenUsed="false" Name="Placeholder Text"/> <w:LsdException Locked="false" Priority="1" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="No Spacing"/> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading"/> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List"/> <w:LsdException Locked="false" Priority="62" SemiHidden="false" UnhideWhenUsed="false" Name="Light Grid"/> <w:LsdException Locked="false" Priority="63" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 1"/> <w:LsdException Locked="false" Priority="64" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 2"/> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1"/> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2"/> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1"/> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2"/> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3"/> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List"/> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading"/> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List"/> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid"/> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 1"/> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List Accent 1"/> <w:LsdException Locked="false" Priority="62" SemiHidden="false" UnhideWhenUsed="false" Name="Light Grid Accent 1"/> <w:LsdException Locked="false" Priority="63" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 1 Accent 1"/> <w:LsdException Locked="false" Priority="64" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 2 Accent 1"/> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 1"/> <w:LsdException Locked="false" UnhideWhenUsed="false" Name="Revision"/> <w:LsdException Locked="false" Priority="34" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="List Paragraph"/> <w:LsdException Locked="false" Priority="29" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Quote"/> <w:LsdException Locked="false" Priority="30" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Intense Quote"/> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2 Accent 1"/> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 1"/> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 1"/> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 1"/> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 1"/> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 1"/> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 1"/> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 1"/> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 2"/> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List Accent 2"/> <w:LsdException Locked="false" Priority="62" SemiHidden="false" UnhideWhenUsed="false" Name="Light Grid Accent 2"/> <w:LsdException Locked="false" Priority="63" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 1 Accent 2"/> <w:LsdException Locked="false" Priority="64" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 2 Accent 2"/> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 2"/> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2 Accent 2"/> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 2"/> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 2"/> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 2"/> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 2"/> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 2"/> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 2"/> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 2"/> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 3"/> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List Accent 3"/> <w:LsdException Locked="false" Priority="62" SemiHidden="false" UnhideWhenUsed="false" Name="Light Grid Accent 3"/> <w:LsdException Locked="false" Priority="63" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 1 Accent 3"/> <w:LsdException Locked="false" Priority="64" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 2 Accent 3"/> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 3"/> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2 Accent 3"/> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 3"/> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 3"/> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 3"/> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 3"/> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 3"/> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 3"/> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 3"/> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 4"/> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List Accent 4"/> <w:LsdException Locked="false" Priority="62" SemiHidden="false" UnhideWhenUsed="false" Name="Light Grid Accent 4"/> <w:LsdException Locked="false" Priority="63" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 1 Accent 4"/> <w:LsdException Locked="false" Priority="64" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 2 Accent 4"/> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 4"/> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2 Accent 4"/> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 4"/> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 4"/> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 4"/> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 4"/> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 4"/> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 4"/> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 4"/> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 5"/> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List Accent 5"/> <w:LsdException Locked="false" Priority="62" SemiHidden="false" UnhideWhenUsed="false" Name="Light Grid Accent 5"/> <w:LsdException Locked="false" Priority="63" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 1 Accent 5"/> <w:LsdException Locked="false" Priority="64" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 2 Accent 5"/> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 5"/> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2 Accent 5"/> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 5"/> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 5"/> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 5"/> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 5"/> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 5"/> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 5"/> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 5"/> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 6"/> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List Accent 6"/> <w:LsdException Locked="false" Priority="62" SemiHidden="false" UnhideWhenUsed="false" Name="Light Grid Accent 6"/> <w:LsdException Locked="false" Priority="63" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 1 Accent 6"/> <w:LsdException Locked="false" Priority="64" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 2 Accent 6"/> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 6"/> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2 Accent 6"/> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 6"/> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 6"/> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 6"/> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 6"/> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 6"/> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 6"/> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 6"/> <w:LsdException Locked="false" Priority="19" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Subtle Emphasis"/> <w:LsdException Locked="false" Priority="21" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Intense Emphasis"/> <w:LsdException Locked="false" Priority="31" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Subtle Reference"/> <w:LsdException Locked="false" Priority="32" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Intense Reference"/> <w:LsdException Locked="false" Priority="33" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Book Title"/> <w:LsdException Locked="false" Priority="37" Name="Bibliography"/> <w:LsdException Locked="false" Priority="39" QFormat="true" Name="TOC Heading"/> </w:LatentStyles> </xml><![endif]--> <!-- [if gte mso 10]> <mce:style><!-- /* Style Definitions */ table.MsoNormalTable {mso-style-name:普通表格; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} --> <!-- [endif]-->

开篇之作，首先介绍系统设计时应考虑的几个方面。

<!-- [if !supportLists]-->1. <!-- [endif]-->用户满意度。

<!-- [if !supportLists]-->2. <!-- [endif]-->时间 <!-- [if gte vml 1]><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <v:stroke joinstyle="miter"/> <v:formulas> <v:f eqn="if lineDrawn pixelLineWidth 0"/> <v:f eqn="sum @0 1 0"/> <v:f eqn="sum 0 0 @1"/> <v:f eqn="prod @2 1 2"/> <v:f eqn="prod @3 21600 pixelWidth"/> <v:f eqn="prod @3 21600 pixelHeight"/> <v:f eqn="sum @0 0 1"/> <v:f eqn="prod @6 1 2"/> <v:f eqn="prod @7 21600 pixelWidth"/> <v:f eqn="sum @8 21600 0"/> <v:f eqn="prod @7 21600 pixelHeight"/> <v:f eqn="sum @10 21600 0"/> </v:formulas> <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/> <o:lock v:ext="edit" aspectratio="t"/> </v:shapetype><v:shape id="对象_x0020_1" o:spid="_x0000_i1025" type="#_x0000_t75" style='width:242.25pt;height:240pt;visibility:visible' o:gfxdata="UEsDBBQABgAIAAAAIQC75UiUBQEAAB4CAAATAAAAW0NvbnRlbnRfVHlwZXNdLnhtbKSRvU7DMBSF dyTewfKKEqcMCKEmHfgZgaE8wMW+SSwc27JvS/v23KTJgkoXFsu+P+c7Ol5vDoMTe0zZBl/LVVlJ gV4HY31Xy4/tS3EvRSbwBlzwWMsjZrlprq/W22PELHjb51r2RPFBqax7HCCXIaLnThvSAMTP1KkI +gs6VLdVdad08ISeCho1ZLN+whZ2jsTzgcsnJwldluLxNDiyagkxOquB2Knae/OLUsyEkjenmdzb mG/YhlRnCWPnb8C898bRJGtQvEOiVxjYhtLOxs8AySiT4JuDystlVV4WPeM6tK3VaILeDZxIOSsu ti/jidNGNZ3/J08yC1dNv9v8AAAA//8DAFBLAwQUAAYACAAAACEArTA/8cEAAAAyAQAACwAAAF9y ZWxzLy5yZWxzhI/NCsIwEITvgu8Q9m7TehCRpr2I4FX0AdZk2wbbJGTj39ubi6AgeJtl2G9m6vYx jeJGka13CqqiBEFOe2Ndr+B03C3WIDihMzh6RwqexNA281l9oBFTfuLBBhaZ4ljBkFLYSMl6oAm5 8IFcdjofJ0z5jL0MqC/Yk1yW5UrGTwY0X0yxNwri3lQgjs+Qk/+zfddZTVuvrxO59CNCmoj3vCwj MfaUFOjRhrPHaN4Wv0VV5OYgm1p+LW1eAAAA//8DAFBLAwQUAAYACAAAACEAApN8ZgMJAAAkcgAA HwAAAGNsaXBib2FyZC9kcmF3aW5ncy9kcmF3aW5nMS54bWzsXctu20YU3RfoPxDcFq75lEQhSiC7 doDCbYTIQdZjciQx5gvDkSznI7oqivYDChToJosC/aMU/YveeVAknciOY9NCnWsDNkUOhzOHI5Ln 3DuHT56t08RYUVbGeTYy7W8t06BZmEdxNh+Zr06P9wamUXKSRSTJMzoyL2lpPnv69VdPyHDOSLGI QwNqyMohGZkLzovh/n4ZLmhKym/zgmawbZazlHD4yOb7ESMXUHOa7DuW1dtPSZyZT+uqviOcGEsW f0ZVSR6e0+iQZCtSQpVJOGyu0W1MwrvXTIbZ6jkrpsWEiZaHP64mzIijkQnIZSQFiMx9vUEXg4/7 V/aa1xWsZywV5fPZzFjLWi7FX1kHXXMjhJWu1bcHtmsaIWxzLd+2+74+yuKF2s+37KAHaw0oYVuB 79Yljm6oBRqnGgELjYaVhWhWtvqwp/2qpy9WJDHs3qbDVdGyOIHTURpZfrgg2ZyOGcsvFpREJTRO lIYjAXCquMSm3hPQPLv4IY8ASLLkuRweVzBq9dWxAxhL1+DlBE7f9WWJTU/JsGAlf07z1BALI5Mm SVyUVB6NrE5KrhpZlRJIlHkSR8dxksgPbH52mDADABiZR2Pxq/vVKpZkxsXIdHwPWnh9HZb8+Vgd LF9mkRwOAsEjvcxJnKhl6FSSSUhLPSb5eirPHV8f5NGlOO4Z/J8wWUlS8im/TKhYHdHZRA1jWHoJ yCdwtkbmG7L3/UQ3pS6SrBIbDmCQZA5XisQ0GIe+w6if5Rkfy5VnRENYFuEBnckeF+Ek5Aqn6hy0 to5n/Jpyeqtu3vkyjdP8DVwfbLgqvQVkBbDGOWXi2iWGgayqdaLExYhuThVfV+OvfZ4IjzODXxZ0 RkIYeWMWE+hhuCCspDA8qvFFGmXe//Hb+9///vfPn02jiHm4OCZpnMC3rwdfws2Oe9AqgSSM97Kx 7zdptheWNcSAvTyDGmNRHhYdAXdK2MnI9Py+6B6Cr09QR+ALxDX4bg1+YHtynOHIV9+OjsAXiGvw vRp82+3bPRz69bWpI/QF5Bp9v4H+wBkMEP3O0ReQa/R7NfqOM4Ch37zsw43wlJxN4dZXXZSquzAl J9kBO5e3xkTczvRH2Fs8g8FT92SZhXAvs01xoC/ojioA1dj2G9j2Pbd9S0Vsb/+0IgDV2A5qbAWw 7TsmYnt7bAWgGtuggW3P77fvh4jt7bEVgKon7gYdkqSJZtGEMFKzIZrtvZrqR3UoAXSr5lXLkk6L lzTUdFERLyihuPN2Bg2iitIKxkBxpwtSUMPua55Q8WJRS7c0uud7G8lg4A+CnquaUMkOdj+AOxC0 VcgOttvznZtoNAfelM2TBo8WA3ge6d6S6A3QxTQBrUgoB77gvBpZSboluts5d5vKnc0/TuXugXKn MadAhuN0ZMLDj24kGSL/Rv6N4ocUSDoiIci/d6g8If/epe6H/HuX6CP/BtW7o4s68u/usEX+3R22 yL+7w3bH/Duo+Pep4LoH+dqwBy36bQiOD5F3JZZ2TcRtDwLUINQCzXYcL/CAc8uY4YaIW44P5FsR cX/g9wdSLNgezmYgSZiCem+JZWe5CGSreLDky4GoXuzQ2IIsWOoREK3GKDRGoR8wBQBZMLJgof5+ gdcdZMHIgh9nXhey4O7YBLLg7rBFFtwdtttZsIj3q3TDkDNFBmUuANsk6aqwNBTiJzJp9+1i7/S1 pHCtzNaymah87Nn2JuLaKkZbma2/vPvnr3fvf/3pw+RWoMkfJrcCD4V2CfbInx7mJZcxcsmd5Mot EfXbNV2GYatg8b02vW6eCj/Lv3cP8dvA51WMv9YYgt1pDL3A9wYunL3tGoNl920HNQaZeo2Z7o1s 9Y7iAgJjcdHATPcdTDNAjQE1BtQYMNP9wec3YaS9Oz6BGkN32KLG0B22qDF0h+39awxGFDMONPJj s20fWG04jVP6eWrDp3bi/6c7wNToK7qDIxPlN1PuHzS3oWeB7KB9CVzXsS01hYAMN7kNtuUFIvlB TDKQuQ0y+QFzG3CGPeoOj8/eAHUH1B1Qd0DdAXWHR+RZg7pDd/wNdYfusEXdoTtsH7XuMA3B3LAl PABfvS9zABGEVwz+dc6iMeOG47QSB0TQ9PopCRvnPektcAq+ZtIXJstFLsJRFEsbGEj/h1bfyYev P/CELSEw95bnYMXtncBywYlQcXvH8mDegvQt/FxyD/vd5HFnQNrscQyefiek5MLIQXb8AqwqR2YG DpYA7TI9zMG5DnSSGctTjbH4LHAV7gOn69eEFdoZkENnxixcvCrkdu1TsN3UwIYZHJ4H2R8K3rav gapZ4q4s+WT8u2FBAV4eExUVh6XagwId+XbImjBPYYfgo16wQ/DREWCX2fg4F2KX6GOeQnfcAPWC 7rBFvaA7bFEv6A7be9ALhCO48grWjuAQVW7lKig79s1c99Y0AvnWgtoonIQhzbjk3YJ1Ni3FP9GQ vTWXXjqyNlKq1UOdnIDfMgbfrIeD1nMqliXPU3Ckm4KvawkezBxe1tCZ+gB8/mr+QPWyAWVNuLP8 AafXcxyYwyBhqzQGmNFS5w+4Qe+OEkP7rN2rNwLkPMxmYMywebvATVqG0nmEReRxrB0mUTVQrxJA H398icI1L1FA1QBVA8wywCwDzDLALAMgAfiOBGnae80NE1WD7pjtY1QN/gMAAP//bFBRasMwDL2K 8e8IzQoNLCyFNSNfY2QNO4DmuImZmhhbDU3PsZ8dYDDYAXajwm6x2Gkgg/lDluz3nqSnGka9ljsQ MuF3RgFyJmowVlLCQ75Y30IsYYY5f76fP75/vt4404pEncFeYZ/waDUjBtfLC1fYGfdq3wTCOtEF xKXcbXPjU+zwRk+5pYJ6lK6x9sF9QGy12MjdJcsFsQ4w4atwOBfBCTFoezGIPdHkhiE0VcJlEzwX nAHSg69PdZA+cmZPCV86GVYqQ8MqIfdtWlRlphB9YaqXFM3YNAyjKMumrnPYn23/dXMYbhjISdL6 6QCoqHdmkPdheHfD+0jHTVv2DniwstBbKWj0jY7FiLDuQhFjK15lmULTgfXUyoCulbgHgnm9/gUA AP//AwBQSwMEFAAGAAgAAAAhAOFRNx/PBgAA5hsAABoAAABjbGlwYm9hcmQvdGhlbWUvdGhlbWUx LnhtbOxZzW/cRBS/I/E/jHxvs9/NRt1U2c1uA23aKNkW9Thrz9rTjD3WzGzSvaH2iISEKIgDlbhx QEClVuJS/ppAERSp/wJvZmyvJ+uQtI2gguaQtZ9/877fm6/LV+7FDB0QISlPel79Ys1DJPF5QJOw 590ajy6sekgqnASY8YT0vDmR3pX199+7jNd8RtMJxyIYRyQmCBglcg33vEipdG1lRfpAxvIiT0kC 36ZcxFjBqwhXAoEPQUDMVhq1WmclxjTx1oGj0oyGDP4lSmqCz8SeZkNQgmOQfnM6pT4x2GC/rhFy LgdMoAPMeh7wDPjhmNxTHmJYKvjQ82rmz1tZv7yC17JBTJ0wtjRuZP6ycdmAYL9hZIpwUgitj1rd S5sFfwNgahk3HA4Hw3rBzwCw74OlVpcyz9Zotd7PeZZA9nGZ96DWrrVcfIl/c0nnbr/fb3czXSxT A7KPrSX8aq3T2mg4eAOy+PYSvtXfGAw6Dt6ALL6zhB9d6nZaLt6AIkaT/SW0DuholHEvIFPOtirh qwBfrWXwBQqyocguLWLKE3VSrsX4LhcjAGggw4omSM1TMsU+5OQAxxNBsRaA1wgufbEkXy6RtCwk fUFT1fM+THHilSAvn33/8tkTdHT/6dH9n44ePDi6/6Nl5IzawklYHvXi28/+fPQx+uPJNy8eflGN l2X8rz988svPn1cDoXwW5j3/8vFvTx8//+rT3797WAHfEHhSho9pTCS6QQ7RLo/BMOMVV3MyEa82 YhxhWh6xkYQSJ1hLqeA/VJGDvjHHLIuOo0efuB68LaB9VAGvzu46Cu9FYqZoheRrUewAtzlnfS4q vXBNyyq5eTxLwmrhYlbG7WJ8UCV7gBMnvsNZCn0zT0vH8EFEHDV3GE4UDklCFNLf+D4hFdbdodTx 6zb1BZd8qtAdivqYVrpkTCdONi0GbdEY4jKvshni7fhm+zbqc1Zl9SY5cJFQFZhVKD8mzHHjVTxT OK5iOcYxKzv8OlZRlZJ7c+GXcUOpINIhYRwNAyJl1ZibAuwtBf0aho5VGfZtNo9dpFB0v4rndcx5 GbnJ9wcRjtMq7B5NojL2A7kPKYrRDldV8G3uVoh+hzjg5MRw36bECffp3eAWDR2VFgmiv8yEjiW0 aqcDxzT5u3bMKPRjmwPn146hAT7/+lFFZr2tjXgD5qSqStg61n5Pwh1vugMuAvr299xNPEt2CKT5 8sTzruW+a7nef77lnlTPZ220i94KbVevG+yi2CyR4xNXyFPK2J6aM3JdmkWyhHkiGAFRjzM7QVLs mNIIHrO+7uBCgc0YJLj6iKpoL8IpLLDrnmYSyox1KFHKJWzsDLmSt8bDIl3ZbWFbbxhsP5BYbfPA kpuanO8LCjZmtgnN5jMX1NQMziqseSljCma/jrC6VurM0upGNdPqHGmFyRDDZdOAWHgTFiAIli3g 5Q7sxbVo2JhgRgLtdzv35mExUTjPEMkIBySLkbZ7OUZ1E6Q8V8xJAORORYz0Ju8Ur5WkdTXbN5B2 liCVxbVOEJdH702ilGfwIkq6bo+VI0vKxckSdNjzuu1G20M+TnveFPa08BinEHWp13yYhXAa5Cth 0/7UYjZVvohmNzfMLYI6HFNYvy8Z7PSBVEi1iWVkU8N8ylKAJVqS1b/RBreelwE2019Di+YqJMO/ pgX40Q0tmU6Jr8rBLlG07+xr1kr5TBGxFwWHaMJmYhdD+HWqgj0BlXA0YTqCfoFzNO1t88ltzlnR lU+vDM7SMUsjnLVbXaJ5JVu4qeNCB/NWUg9sq9TdGPfqppiSPydTymn8PzNFzydwUtAMdAR8OJQV GOl67XlcqIhDF0oj6o8ELBxM74BsgbNY+AxJBSfI5leQA/1ra87yMGUNGz61S0MkKMxHKhKE7EBb Mtl3CrN6NndZlixjZDKqpK5MrdoTckDYWPfAjp7bPRRBqptukrUBgzuef+57VkGTUC9yyvXm9JBi 7rU18E+vfGwxg1FuHzYLmtz/hYoVs6odb4bnc2/ZEP1hscxq5VUBwkpTQTcr+9dU4RWnWtuxlixu tHPlIIrLFgOxWBClcN6D9D+Y/6jwmb1t0BPqmO9Cb0Vw0aCZQdpAVl+wCw+kG6QlTmDhZIk2mTQr 69ps6aS9lk/W57zSLeQec7bW7CzxfkVnF4szV5xTi+fp7MzDjq8t7URXQ2SPlyiQpvlGxgSm6tZp G6doEtZ7Htz8QKDvwRPcHXlAa2haQ9PgCS6EYLFkb3F6XvaQU+C7pRSYZk5p5phWTmnllHZOgcVZ dl+SUzrQqfQVB1yx6R8P5bcZsILLbj/ypupcza3/BQAA//8DAFBLAwQUAAYACAAAACEAnGZGQbsA AAAkAQAAKgAAAGNsaXBib2FyZC9kcmF3aW5ncy9fcmVscy9kcmF3aW5nMS54bWwucmVsc4SPzQrC MBCE74LvEPZu0noQkSa9iNCr1AcIyTYtNj8kUezbG+hFQfCyMLPsN7NN+7IzeWJMk3ccaloBQae8 npzhcOsvuyOQlKXTcvYOOSyYoBXbTXPFWeZylMYpJFIoLnEYcw4nxpIa0cpEfUBXNoOPVuYio2FB qrs0yPZVdWDxkwHii0k6zSF2ugbSL6Ek/2f7YZgUnr16WHT5RwTLpRcWoIwGMwdKV2edNS1dgYmG ff0m3gAAAP//AwBQSwECLQAUAAYACAAAACEAu+VIlAUBAAAeAgAAEwAAAAAAAAAAAAAAAAAAAAAA W0NvbnRlbnRfVHlwZXNdLnhtbFBLAQItABQABgAIAAAAIQCtMD/xwQAAADIBAAALAAAAAAAAAAAA AAAAADYBAABfcmVscy8ucmVsc1BLAQItABQABgAIAAAAIQACk3xmAwkAACRyAAAfAAAAAAAAAAAA AAAAACACAABjbGlwYm9hcmQvZHJhd2luZ3MvZHJhd2luZzEueG1sUEsBAi0AFAAGAAgAAAAhAOFR Nx/PBgAA5hsAABoAAAAAAAAAAAAAAAAAYAsAAGNsaXBib2FyZC90aGVtZS90aGVtZTEueG1sUEsB Ai0AFAAGAAgAAAAhAJxmRkG7AAAAJAEAACoAAAAAAAAAAAAAAAAAZxIAAGNsaXBib2FyZC9kcmF3 aW5ncy9fcmVscy9kcmF3aW5nMS54bWwucmVsc1BLBQYAAAAABQAFAGcBAABqEwAAAAA= "> <v:imagedata src="file:///C:/DOCUME~1/mtk40157/LOCALS~1/Temp/msohtmlclip1/01/clip_image001.png" mce_src="file:///C:/DOCUME~1/mtk40157/LOCALS~1/Temp/msohtmlclip1/01/clip_image001.png" o:title="" cropbottom="-205f"/> <o:lock v:ext="edit" aspectratio="f"/> </v:shape><![endif]--><!-- [if !vml]--><!-- [endif]-->

<!-- [if !supportLists]-->3. <!-- [endif]-->费用

<!-- [if !supportLists]-->4. <!-- [endif]-->范围

<!-- [if !supportLists]-->5. <!-- [endif]-->质量

时间，费用，范围；孰轻孰重就见仁见智了。但是用户满意度和质量却是每个系统都必须特别重视的。用户满意度来源于好的系统质量，系统运行质量，系统服务质量等。而要有好的系统质量，就一定要做好系统设计了。

接下来，进入主题。 Teamcenter 系统开发设计

Class 设计

首先明确需增加的类的逻辑层次结构； 根据新类会有哪些特性和行为。决定继承层次。通俗来讲，就是龙生龙，凤生凤了。标准可能会有：是否会跟 Project 相关？使用 Role Assnment ？决定继承自 WorkItem; 是否会跑流程？ 等等。

其次，尽量避免从 Admin Class 继承，这样会降低系统效能。原因是， Teamcenter 使用分布式数据库，如果从 Admin 继承的话，会降低系统的性能。

再有，对于 key 的定义也应该谨慎，应为 key 表的查询也会降低系统性能。

转载地址：https://blog.csdn.net/iteye_18039/article/details/81967411 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！