Actors and Data Stores


Actors are objects represented in the functional model that produce or consume data. An actor may store some data for further processing steps.

Data Stores:

Data stores are store house of data represented in the functional model. A data store could only store or consume data, but could not produce data.

Below is an example detailing DFD for computing volume and surface area of a cylinder – Enjoy!!

Object identified – Cylinder

Processes identified – Compute volume, compute surface area

Data flows identified –

Input : radius, height

                                   Output: volume, surface area

The DFD is as shown below –