Explain about the e-r diagram, Software Engineering

Assignment Help:

Explain about the E-R Diagram

Entity-relationship (E-R) diagram is detailed logical representation of data for an organisation. It is data oriented model of a system while DFD is a process oriented model. ER diagram represent data at rest whereas DFD tracks the motion of data.

ERD doesn't provide any information regarding functionality of data. It has 3 main components - data entities, their relationships and their associated attributes.

 

 


Related Discussions:- Explain about the e-r diagram

Resource usage with reference to software reliability models, Q. Resource u...

Q. Resource usage with reference to software reliability models? Resource usage: It is linearly proportional to implementation time t and mean failures experienced μ. Let Xr

Case study - conference management system, This case study looks at the req...

This case study looks at the requirements for an information system to manage the organisation of an international academic conference. An academic conference consists of presenta

Need of output comparators, Q. Need of Output comparators? Output comp...

Q. Need of Output comparators? Output comparators These are used in dynamic testing-both single-module and multiple-module (system level) varieties to check that predicted an

What are the aims of analysis modelling, What are the aims of Analysis mode...

What are the aims of Analysis modelling? i. To make apparent what the customer wants. ii. To set up a basis for the creation of software design. iii. To devise a set of v

Define software testing, Define software testing. Software testing is a...

Define software testing. Software testing is a process used to help recognize the correctness, completeness and superiority of developed computer software. With that in mind, t

What is meant by software engineering, What is meant by Software Engineerin...

What is meant by Software Engineering? The application of a disciplined, systematic, quantifiable approach to the development, maintenance & operation of software. (i.e.)The En

Write about the types of project plan, Write about the types of project pla...

Write about the types of project plan. Quality plan - This plan explains the quality procedures and standards that will be used in a project. Validation plan - This plan explai

Define about the integration testing, Define about the Integration testing ...

Define about the Integration testing - This test is performed to verify interfaces between system components, interactions between application and file system, hardware and ot

What are the tools mainly used for information gathering, What are the tool...

What are the tools are mainly used for information gathering 1.  Record review: A review of recorded documents of organisation is performed.Manuals procedures, forms and book

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