《6.工程项目进度管理》由会员分享,可在线阅读,更多相关《6.工程项目进度管理(35页珍藏版)》请在金锄头文库上搜索。
1、工程项目管理精品课程组Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.双代号网络计划时间参数的计算一.按工作计算法计算二.按节点计算法计算三.关键工作与关键线路的确定四.关键节点的特性Ev
2、aluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.二. 按节点计算法计算节点计算法:是以节点为讨论对象,先计 算节点的最早时间和最迟时间,再据之计 算出工作的六个时间参数。对比:工作计算法:以工
3、作为对象 ,直接计算。3Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.二. 按节点计算法计算节点计算法的计算次序:最早时间计划工期最迟时间工作时间参数 4间接推算Evaluation o
4、nly.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.二. 按节点计算法计算1. 节点最早时间的计算 节点的最早时间:是指该节点后各个工作统一的 最早开始时间。以ETi表示。二个基本规律: 从网络计划的起点节点开始,顺
5、着箭线方向逐 个计算。 等于其紧前工作开始节点的最早时间加上以该 工作的工作历时之和的最大值。 5Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.二. 按节点计算法计算 1. 节点最早时间
6、的计算节点计算分两种情况: (1)网络计划的起点节点的最早时间如无规定 时,其值等于零,即(2)其它节点的最早时间等于其紧前各工作开 始节点的最早时间加上以该节点为起始节点的相 应工作的各个工作历时之和的最大值,即 6或Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty
7、 Ltd.Copyright 2004-2011 Aspose Pty Ltd.二. 按节点计算法计算 1. 节点最早时间的计算 节点 j 与节点 i 之间无虚工作时 节点 j 与节点 h 之间有虚工作时7ijkETiETjDi-jDj-khijEThETjDh-ik Dj-kEvaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. C
8、opyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.二. 按节点计算法计算2网络计划的计算工期网络计划的计算工期(calculated project duration)是指根据时间参数计算得到的工期。等于其终点节点的最早时间,以Tc表示。即 8kmnETkETmDk-mDm-nETnEvaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspos
9、e.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.二. 按节点计算法计算3网络计划的计划工期网络计划的计划工期(planned project duration)是指根据要求工期和计算工期所确定的作为实施目标的工期,以Tp表示。要求工期(required project duration)是指任务委托人所提出的指令性工期,以Tr表示。9Evaluation only.Evaluation only. Created
10、 with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.二. 按节点计算法计算3网络计划的计划工期 当未规定要求工期Tr时,计划工期Tp等于计算工期Tc ,即: 当规定要求工期Tr时,则计划工期Tp不应超过 要求工期Tr ,即: 1 0Evaluation only.Eval
11、uation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.二. 按节点计算法计算4节点最迟时间的计算 节点的最迟时间:是指该节点前各内向工作的最 迟完成时刻,以LTi 表示。二个基本规律: 从网络计划的终点节点开始,逆着箭线方向逐 个计算
12、。 等于其紧后工作完成节点的最迟时间减去该工 作历时之差的最小值 。 11Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.二. 按节点计算法计算 4节点最迟时间的计算 节点计算分两种情况:
13、 (1)网络计划的终点节点的最迟时间如无规定 时,其值等于计划工期,即(2)其它节点的最迟时间等于其紧后各工作完 成节点的最迟时间减去以该节点为完成节点的各个工作历时之和的最小值,即 12或Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright
14、2004-2011 Aspose Pty Ltd.二. 按节点计算法计算4节点最迟时间的计算 节点 i 与节点j 之间无虚工作时 节点i 与节点 k 之间有虚工作时13ijkLTiLTjDi-jDj-khijLTiLTkDh-ikDj-kEvaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 A
15、spose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.二. 按节点计算法计算5工作最早开始时间的计算工作的最早开始时间等于该工作开始节点的最早时间,即 14ijkETiDijDj-kESijLTjEvaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011
16、Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.二. 按节点计算法计算6工作最早完成时间的计算工作的最早完成时间等于该工作的最早开始时间与该工作工作历时之和,即15ijkETiDijDj-kLTjEFi-jEvaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.二. 按节点计算法计算7工作最迟完成时间的计算工作的最迟完成时间等于该工作完成节点的最迟时间,即16ijkETiDi-jDj-kLTjLFi-jEvaluation only.Evaluation only. Create