In an industry where time is money, 项目计划的估计必须考虑到生命的可变性. 关键路径方法确保项目按时完成, resources are available when needed, and increases overall efficiency.
What is the Critical Path Method?
CPM是一种计算项目进度和完成时间的调度方法. It used to be drawn with pen and paper as a flow chart. Today, 我们有软件应用程序来安排项目活动, calculate completion times, 并将其与WBD(工作分解结构)等其他技术结合起来, PERT (Program Analysis and Review Technique), 以及用来估计每个步骤持续时间的甘特图.
The PERT method 任务持续时间评估技术是否考虑了三个因素 “optimistic duration,” 完成一项任务所需的最短时间 “pessimistic duration,” the most extended amount of time, and the “most likely duration,” which is in between the two. “最可能”任务持续时间的平均结果将变成 “expected duration” of the project.
The Work Breakdown Structure 包括项目中涉及的所有任务，详细说明承包商要执行的工作, subcontractors, and vendors. It includes what immediately precedes each task, what follows that task, and what can be done at the same time. 它与甘特图一起用周/月/年的时间线进行说明，彩色条形图拉伸了每个完成时间的长度.
Time-oriented scheduling 关注项目完成时间，但不仅仅是计划日期. 它还包括将资源和设备的到达时间与任务相匹配，以消除停机时间并降低成本. Resource-oriented scheduling 侧重于提供有限的资源，以帮助减轻限制.
While the CPM model can keep a project on track, it is dependent on having accurate information put into it. Inaccurate estimates, poor communication from engineers, architects, or project teams, change orders, and other variables can cause a project to fall off course.
经验丰富的施工管理专业人员注意到情况可能会有所不同, project scopes change, and estimates revised. 当这些变量在整个过程中出现时，必须更新关键路径模型.
In CPM, a critical path is identified. As long as the critical tasks are not affected, 小的工期变化或修订不会延迟项目或危及完成日期.
项目后分析检查在施工期间发生的事情的文档，并确定偏离项目进度的原因和影响. 这种分析有助于建筑公司从以前的项目中学习和获得经验. 这就是为什么有一个经验丰富的施工管理公司分配给你的建筑项目是至关重要的.
Critical Path Method Best Practices
与业主代表和项目团队合作制定详细计划.
在工作范围内包括可能延迟项目的业主责任.
监控提交、审批、订购制造时间和交付进度.
记录所有可能影响项目完成的非项目工作.
在时间表上仔细列出资源使用计划.
留出足够的时间来制定一个非常详细的时间表, quality control review, updates, and analysis.
Use cost/schedule/risk assessment and monitoring.
Include pre-construction tasks in the schedule.
Efficiently sequence the critical path.
Ensure accurate task duration estimates.
Consider resource-workflow relationships.
Create buffers for inevitable delays.
Decide on an indicator for project completion.
Learn from history.
What questions, stories, 你是否有与建筑和关键路径方法相关的经验? Leave a comment below and start a conversation!
About 365体育平台
When you work with 365体育平台, 你和我们公司的负责人卢·马奇和托德·劳巴赫一起工作，他们是马奇处理的每个项目的关键部分. 我们提供比大型建筑公司更好的实际服务和沟通. March has a passionate and hard-working management team.
Over the last decade, Lou March Jr. 将三月建设带入了新一代的质量施工管理. 他把March，它的员工，以及他们的家人作为他的首要任务. 保持这种责任也意味着在快速增长的市场中尽量减少不必要的风险, selecting quality projects, and only accepting opportunities within our resources. 我们有一个全面的安全计划由安全主管弗兰克·布雷迪负责, which teaches best practices and to ensure the health, wellbeing, and compliance of subcontractors and their employees.
了解更多365体育平台的专家在建筑行业工作的经验，请阅读 March Pro Articles section of our Blog. Our employees are proud to work at March, voting us one of The Best Places to Work in NJ 2018 by NJBIZ.
Ready to take the first step? 给我们打个电话(973)-904-0213，现在就和某人谈谈三月可以如何帮助你的商业建筑项目.
You can also drop by our office located in Wayne, NJ. 我们从周一到周五上午9点到下午5点开放(三月建筑601汉堡收费公路韦恩, NJ 07470)
Looking to contact us off-hours? Please shoot us a quick email at [email protected]. We will get back to you within one business day.
