What are the rules for making DFD, Software Engineering

Assignment Help:

What are the Rules for making DFD  

The below factors must be considered when making DFDs: 

1.   Keep a note of all processes and external entities. Give unique names to them.

Identify the manner in which they interact with one another.

2.   Do numbering of processes.

3.   Avoid complex DFDs (if possible). 

4.   The DFD must be internally consistent. 

5.   Each process must have minimum of one input and one output. 

Data store must contain all the data elements which flow as output and input. 

 


Related Discussions:- What are the rules for making DFD

Define the design phase of SDLC, Define the Design phase of SDLC In th...

Define the Design phase of SDLC In this stage, a logical system is built which fulfils given requirements. Design phase of software development deals with transforming custome

State the system engineering hierarchy, State the System Engineering Hierar...

State the System Engineering Hierarchy The world view is made up  of a set of domains (Di),which can either be a system or a system of systems. WV = {D1,D2,D3,...........,Dn

Compute act and the total cost of the system, a) Define Annual Change Traff...

a) Define Annual Change Traffic (ACT) and Annual Maintenance Effort (AME) of Boehm model. b) For a software system of 90 KLOC, 5KLOC of code was added. The initial development

When we need re-engineer, Q. When we need Re-Engineer? When the sys...

Q. When we need Re-Engineer? When the system changes are mainly confined to part of the system then re-engineer that part. When hardware or else software support become

Software licesnse, what are the main characteristics of software lease

what are the main characteristics of software lease

Advanced software engineering, Is there ever a case when the generic activi...

Is there ever a case when the generic activities of the software engineering process don’t apply?

Explain in detail about structural modeling, Explain in detail about Struct...

Explain in detail about Structural Modeling. Structural model having a detail refinement of ERD, data flow model and control flow model. Creating an ERD. Example: Saf

Explain depth of conditional nesting, Depth of conditional nesting Thi...

Depth of conditional nesting This is a measure of the depth of nesting of if-statements in a program. Deeply nested if statements are hard to understand and are potentially er

Define the method of direct changeover, Define the method of Direct changeo...

Define the method of Direct changeover With this technique, old system is stopped and new system is used Straight away;  - This method can be disastrous if new system fails

What is vo browser extension, What is VO browser extension? - It is a S...

What is VO browser extension? - It is a SilkTest add-on component to test Web applications. - To identify browser-rendered objects it employs sophisticated pattern recogniti

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd