shown in a schedule should be some convenient interval, such as a day, a week, or a month.

NETWORK ANALYSIS

In the late 1950s, a new system of project planning, scheduling, and control came into widespread use in the construction industry. The critical path analysis (CPA), critical path method (CPM), and project evaluation and review technique (PERT) are three examples of about 50 different approaches. The basis for each of these approaches is the analysis of a network of events and activities. The generic title of the various networks is network analysis.

The network analysis approach is now the accepted method of construction planning in many organizations. Network analysis forms the core of project planning and control systems and is accomplished by completing the following steps:

1. Develop construction activities. After careful review of the plans and specifications (specs), your first step is to break the job down into discreet activities. Construction activities are generally less than 15 days in duration and require the same resources throughout the entire duration.

2. Estimate construction activity requirements. Evaluate the resource requirements for each construction activity. Identify and list all of the materials, tools, equipment (including safety-related items), and manpower requirements on the Construction Activity Summary (CASS) Sheet.

3. Develop logic network. List the construction activities logical] y from the first activity to the last, showing relationships or dependencies between activities.

4. Schedule construction activities. Determine an estimated start and finish date for each activity based on the sequence and durations of construction activities. Identify the critical path. This will help focus attention of management on those activities that cannot be delayed without delaying the project completion date.

5. Track resources. As the crew leader, you must be sure the necessary resources are available on the project site on the day the work is to be performed. For materials on site, this will be as easy as submitting a material request, NAVSUP Form 1250-1, to the material liaison office (MLO) several days in advance. For local purchase requirements, such as a concrete request to MLO, a request can be required 2 to 3 weeks in advance.

6. Control resources. As the crew leader, you are also responsible for on-site supervision of all work performed. Productive employment of available resources to accomplish assigned tasking is your greatest challenge.

PROGRESS CONTROL

Progress control is the comparing of actual progress with scheduled progress and the steps necessary to correct deficiencies or to balance activities to meet overall objectives.

CONSTRUCTION DRAWINGS

In planning any project, you must be familiar with construction drawings and specifications. The construction of any structure or facility is described by a set of related drawings that gives the Seabees a complete sequential graphic description of each phase of the construction process. In most cases, a set of drawings shows the location of the project, boundaries, contours, and outstanding physical features of the construction site and its adjoining areas. Succeeding drawings give further graphic and printed instructions for each phase of construction.

TYPES OF CONSTRUCTION DRAWINGS

Drawings are generally categorized according to their intended purposes. Some of the types commonly used in military construction are discussed in this section.

Master Plan Drawings

MASTER PLAN DRAWINGS are commonly used in the architectural, topographical, and construction fields. The y show sufficient features to be used as guides in long-range area development. They usually contain section boundary lines, horizontal and vertical control data, acreage, locations and descriptions of existing and proposed structures, existing and proposed surfaced and unsurfaced roads and sidewalks, streams, right-of-way, existing utilities, north point indicator (arrow), contour lines, and profiles. Master plan and general development drawings on existing and proposed Navy installations are maintained and constantly upgraded by the