Page 32 - DCAP305_PRINCIPLES_OF_SOFTWARE_ENGINEERING

Principles of Software Engineering

Notes Therefore, any software manufacture web will in some way understand only an approximate
or incomplete description of software development. Articulation work is a kind of surprising
task that is performed when a planned task chain is inadequate or breaks down. It is work that
represents an open-ended non-deterministic sequence of actions taken to restore progress on the
disarticulated task chain, or else to shift the flow of productive work onto some other task chain
thus, descriptive task chains are employed to characterize the observed course of events and
situations that emerge when people try to follow a planned task sequence. Articulation work in the
context of software evolution includes actions people take that entail either their accommodation
to the contingent or anomalous behaviour of a software system, or negotiation with others who
may be able to affect a system modification or otherwise alter current circumstances this notion
of articulation work has also been referred to as software process dynamism.

Design a structure for software project model.

2.2 Characteristics of Software Model

Software disaster leads to the term “Software Engineering.” Software engineering is the limb
of software that deals with development of well urbanized software that satisfies all the users’
requirements and ensures that the software is provided on time and within financial plan the
software is provided along with documentation that gives explanation to the user on how to
use the software. Software engineering can be defined as: “Software engineering is the branch of
engineering in which the software is developed in a manner that it will have all the properties like
maintenance, extensibility and is within time and budget and also satisfies all the requirements
given by user.” Producing software does not mean producing just software but it means to
develop the software in a cost effective manner. Characteristics of well engineered software are:
Efficiency: Software is said to be well-organized if it uses the available resources in the most
efficient manner. The software should be able to offer a quick response in the least processing time
using the resources at minimum level. Resources refer to the memory and processor utilization.
The software should efficiently perform what the user demanded and give appropriate response
in each case i.e. the output given is accurate or not.
Maintainability: This characteristic of the software is important for both the software engineer
and the user. If the change is to be required in the software then the change leads to the change in
the software so that it performs in accordance with the user requirement. The software engineer
has to respond very fast if there is any change in the user requirements. Changes should be
performed like this that it will not affect the overall integrity of the software.

On-time: The software should be developed on-time. If the software is urbanized late then it is
of no use. A good engineer always develops the software on-time.
Within Budget: Some of the software gets swarming. Overrun does not mean that the cost of the
software exceeds the limit given by user. But, it means that the software cost is out of control.
So, the software should be developed in such a manner that it will not overrun and the software
being developed is within budget.
Functionality: The software system is developed in a manner that it performs the entire task
perfectly for which it is developed. The software should respond correctly as the user wants.
Adaptability: The software should be adaptable. Software is desired to be adaptable all the
changes efficiently. The software should easily adopt all the changes in the software with no
change in the efficiency of the software.
Dependability: It is the ability of the software that should not cause any physical or economic
damage in the event of system failure. It includes a range of characteristics like: Reusability,
security, and safety.

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