Functional Block Diagram F.1 Global VIllage People

Diagrams

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Notes

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Description

This diagram shows all the people connected to a village system. It includes both working and non-working since the latter use resources generated by other parts of the system such as food and housing. The total number of desired people can be set as a design input for the rest of the system. The number of required people is then an output based on the system design.

The labor part of the people is determined from the labor requirements of the equipment and facilities functions, plus surplus labor and overhead. Surplus labor is used outside the system. For example, if extra cash is needed to buy parts and materials, an outside paid job would count as surplus labor. Overhead is labor indirectly needed besides direct equipment and facilities labor. Examples include training staff and labor scheduling. For estimating purposes one person supplies 8 hours labor per day at 240 days per year. For analysis purposes this value can be varied up or down to see how it affects the overall system model.

Labor is divided by skill, such as welding or tractor operator. Missing skills show a need to add people or perform training. Extra skills among the set of people is needed since use of a given skill is not always constant, and people sometimes cannot work when expected.

For estimating, the non-working part of the people is assumed to be 1.2 times the working part. This is based on the United States ratio of total population to employed population. For analysis, this ratio can be varied up or down to see how it affects the results.

People require inputs in order to live at all, or live decently. The following is a partial list of inputs. It needs to be developed further.

Food - A rough number of 2400 food Calories (kcal) per person are needed. More detailed numbers by age, sex, and level of activity can be found at Dept HHS Food Balance

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Higher Level: {To be done)

Inputs: (To be done)

Outputs: (To be done)

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Mechanisms: (To be done)