Essay Zone.com - Free essays!
REGISTER NOW!
Login to an existing account
     
GCSE essays
A Level essays
University essays
Forum
Why join?
Essay quality
FAQ

Search forums
About us
Contact us

 

 
The Importance of Data Models Free essay! Download now

Home > A Level > Computing > The Importance of Data Models

The Importance of Data Models

You can download this essay for free. All you need to do is register and submit at least one of your essays to us.

Or you can purchase this essay for just $2 instantly without registering

Downloads to date: N/A | Words: 1300 | Submitted: 07-Feb-2013
Spelling accuracy: 97.9% | Number of pages: 6 | Filetype: Word .doc


This is what the first 3 pages of the essay look like

The Importance of Data Models essay previewThe Importance of Data Models essay previewThe Importance of Data Models essay preview

Description

Data models in Data base management systems

Preview

Analysis
Name an end-user and explain the "problem".  Identify the aspects of the problem that you will tackle.
·        Explain in detail any relationship between the system you intend to produce and the existing manual system.  
·        You should have a lengthy interview with your end-user (do not just rely on a questionnaire).  Spend time in the working environment and talk to everyone whose working life will be affected by your system.  Gather sample documents and include them in your project.  Make a full record of any visits/meetings.  Then, draw conclusions from these interviews/observations.
·        Come up with an agreed requirements specification with your intended user(s). Get the end-user to sign his/her requirements. These will be your performance criteria that will drive the whole project, from this point onwards.  
·        Identify qualitative and quantitative evaluation criteria (obviously, these should be heavily influenced by the end-user's requirements specification).
·        Explain clearly how your system will improve the current system (avoid vague statements such as “to save time”, “to improve efficiency”, “to make system user friendly” etc.)  
·        Identify those elements of your system that are intended to be "reusable"
·        What hardware and software will be used and why?
See http://www.athree.com/access_info/pros_and_cons.html for a description of the pros and cons of Access.
You also need to explain why you will be using Access instead of Excel
·        You should show an appreciation of the full potential of the hardware and software that you intend to use.  
·        List the Inputs, Outputs and Processes.  Be very specific about these.
·        Fully explain the information flow (include Data Flow Diagrams).
All About Data Flow Diagrams
How to Draw Flowcharts
It is very important that you explain the diagrams.  A diagram alone does not fully explain the flow of data.
·        Evaluate the user’s current IT skill level and his/her training needs  
·        Explain how the software will be used.
·        Are there any legal, ethical and social issues arising from what you intend to do (e.g. issues of data protection?)
 
Design
·        Consider in detail a range of appropriate approaches to a solution.  Why is an Access solution preferable to an Excel solution?  Why is a computerised system preferable to a manual system?  Why is a relational database better than a flat file solution?  Do some basic designs to show how these alternative approaches would work.
·        Give compelling reasons for the final choice of solution. Consider the likely effectiveness of your solution.  
·        Follow a process of Normalization.
See: http://itm.blackpool.ac.uk/computing/Course_Webs/HND_Computing/DATABASE/03/norm.pps 
·        Produce entity-relationship diagrams
See: Drawing Entity Relationship Diagrams using PowerPoint
See: A more complicated description of ERDs and Normalisation
·        Break down all envisaged tasks into sub-tasks.
·        Create a well defined schedule and ...

Download this essay in full now!

Just upload at one of your essays to our database and instantly download your selection! Registration takes seconds

Or you can download this essay for $2 immediately without registering


Comments and reviews

Reviews are written by members who have downloaded the essay

No comments yet. If you download the essay you can review it afterwards.