Understanding Charts for Work Analysis

Different charts and diagrams are used in work study and operations management to analyze and improve processes. The question asks for a chart that provides information on both the progress of work and the loading of machines simultaneously.

Analyzing the Chart Options

Let's look at the different options provided and what information each type of chart typically presents:

• Bar chart: A bar chart usually compares different categories or tracks changes over time. While it can show aspects of work progress (like tasks completed over time), it doesn't typically detail machine loading specifically.
• Machine load chart: This chart focuses on the load or demand placed on machines over a period. Its primary purpose is to show machine utilization and identify bottlenecks or idle time related specifically to machines. It doesn't inherently detail the operator's activities or overall work progress beyond the machine's involvement.
• Man-machine chart: This chart is specifically designed to show the synchronized activities of a worker (man) and a machine over a period of time. It graphically represents what the worker is doing and what the machine is doing (running, idle, being loaded/unloaded) at the same time. This allows for the analysis of idle time for both the man and the machine and helps optimize their combined activities. By showing both man's work cycle and machine's operational cycle, it effectively reflects work progress from the operator's perspective and machine loading/utilization from the machine's perspective.
• Pie chart: A pie chart represents parts of a whole and is typically used to show proportions or percentages at a single point in time. It is not suitable for illustrating progress over time or the dynamic loading of machines.

Man-Machine Chart: Combining Work Progress and Machine Loading

The Man-machine chart is uniquely suited to provide information on both work progress and machine loading simultaneously. It breaks down the work cycle into elements and shows when the man is working, when the machine is working, and when either is idle. This detailed view allows for:

• Identifying idle time for both man and machine.
• Optimizing the sequence of operations.
• Determining the number of machines a single operator can manage efficiently.
• Visualizing the relationship between manual work and machine operation, thus showing progress (tasks completed) in conjunction with machine utilization (loading).

Therefore, the chart that gives simultaneous information about the progress of work (through the man's activity) and machine loading (through the machine's activity and idle time) is the Man-machine chart.