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Float analysis of non-serial repetitive activities

机译：非串行重复活动的浮动分析

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摘要

Floats and critical path(s) are important issues in construction management practice. In critical path method, activities not on the critical path(s) must have float. Float measures the amount of time an activity can be delayed before it becomes critical. Consecutive repetitive activities have production rates, which may vary considerably from one activity to another. This creates a different situation (from traditional non-repetitive activities) such that repetitive activities may have rate float, in addition to time float. In this paper, a proposed model for determining different types of floats for non-serial repetitive activities is developed. The traditional concept of time float is extended to repetitive activities. Rate float, which is an inherent property of repetitive activities, is also determined. Float analysis is performed in a very similar way to Critical Path Method (CPM) analysis, without the need for graphical aids. The analysis is based on a repetitive scheduling method, which utilizes a traditional CPM network of a typical unit, in which overlapping activities are used to model repetitive activities. A constant activity production rate is assumed and resource continuity is maintained. The method for determining time floats (total and free) and the rate float of non-critical activities and of non-controlling segments of controlling activities is described in detail. The proposed model was automated by a macro-program, which has been coded on a commercial scheduling software to facilitate float determination.
机译：浮动和关键路径是施工管理实践中的重要问题。在关键路径方法中，不在关键路径上的活动必须具有浮动状态。浮动量度了一项活动变得很关键之前可以延迟的时间。连续重复活动的生产率可能因一项活动而异。这就产生了与传统的非重复性活动不同的情况，使得重复性活动除了时间浮动外还可能具有利率浮动。在本文中，提出了一种用于确定非串行重复活动的不同浮点类型的建议模型。时间浮动的传统概念已扩展到重复性活动。还确定了利率浮动，这是重复性活动的固有属性。浮点分析以与关键路径方法（CPM）分析非常相似的方式执行，而无需图形辅助。该分析基于重复调度方法，该方法利用典型单位的传统CPM网络，其中重叠活动用于对重复活动进行建模。假定活动生产率恒定，并保持资源连续性。详细描述了确定非关键活动和控制活动的非控制段的时间浮动（总计和空闲时间）和速率浮动的方法。所提出的模型由宏程序自动执行，该宏程序已在商业调度软件上进行了编码，以方便进行浮点确定。

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