1 Figure TB-4

question 22

Essay

1. Figure TB-4.1 is a "generic" level 0 data flow diagram (DFD), taken from Figure 4.5 in the text.

Required:
Using good data flow diagram construction techniques draw a diagram to explode bubble 3.0 to its next lower level. Diagram 3.0 should contain three processes, appropriately numbered, and should contain the following data flows in addition to those in the level 0 diagram (see NOTE):
a. Flow H runs from the first process to the second.
b. Flow I runs from the first process to the third.
c. Flows J and K run from the second process to the third.

NOTE: Assume that the flows shown in the level 0 diagram affect diagram 3.0 as follows:
1. Flow D runs to the first process in diagram 3.0.
2. Flow B runs from the third process in diagram 3.0.
3. The data flow running from the data store runs to the second process in diagram 3.0.

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Definitions:

Nectar-producers

Organisms, typically flowering plants, that generate nectar, a sweet fluid attracting pollinators such as bees and hummingbirds.

Male Part

Refers to the stamen in plants, which is the pollen-producing reproductive organ.

Anther

The part of a flower's stamen that contains the pollen, which is necessary for fertilization.

Carpel

Of a flower, reproductive organ that produces the female gametophyte; consists of an ovary, stigma, and usually a style.