https://padlet.com/callum01/tcf9eu7kc29g Data Flow Diagrams (DFDs) en-us 2018-11-09 09:11:48 UTC 2018-11-12 16:03:00 UTC hello@padlet.com callum01 https://padlet.com/callum01/tcf9eu7kc29g/wish/302469181 The know it section]]> 2018-11-09 09:11:48 UTC https://padlet.com/callum01/tcf9eu7kc29g/wish/302469181 callum01 https://padlet.com/callum01/tcf9eu7kc29g/wish/302469182 An organisation has internal and external information available to answer a query

a) Describe one reason why the organisation may choose to use the internal information
b) Describe one reason why the organisation may choose to use the external information]]> 2018-11-09 09:11:48 UTC https://padlet.com/callum01/tcf9eu7kc29g/wish/302469182 callum01 https://padlet.com/callum01/tcf9eu7kc29g/wish/302469183 Compare Qualitative and Quantitative data]]> 2018-11-09 09:11:48 UTC https://padlet.com/callum01/tcf9eu7kc29g/wish/302469183 callum01 https://padlet.com/callum01/tcf9eu7kc29g/wish/302469184 Identify three entities for a train ticket booking system]]> 2018-11-09 09:11:48 UTC https://padlet.com/callum01/tcf9eu7kc29g/wish/302469184 callum01 https://padlet.com/callum01/tcf9eu7kc29g/wish/302469185 Identify two data flows for an electricity billing system ]]> 2018-11-09 09:11:48 UTC https://padlet.com/callum01/tcf9eu7kc29g/wish/302469185 callum01 https://padlet.com/callum01/tcf9eu7kc29g/wish/302469186 Describe one characteristic of a smooth flowing data management system]]> 2018-11-09 09:11:48 UTC https://padlet.com/callum01/tcf9eu7kc29g/wish/302469186 callum01 https://padlet.com/callum01/tcf9eu7kc29g/wish/302469188 Qualitative data is data that is based on attributes, such as the colour of a car. On the other hand, quantitative data is data based on the amount of something that can be counted and expressed in numbers, such as the number of red cars.]]> 2018-11-09 09:11:48 UTC https://padlet.com/callum01/tcf9eu7kc29g/wish/302469188 callum01 https://padlet.com/callum01/tcf9eu7kc29g/wish/302469189 Three entities for a train ticket booking system include ticket prices, train arrival/departure times, and train passenger capacities.]]> 2018-11-09 09:11:48 UTC https://padlet.com/callum01/tcf9eu7kc29g/wish/302469189 callum01 https://padlet.com/callum01/tcf9eu7kc29g/wish/302469190 Two data flows for an electricity billing system include amount of electricity used, and bill costs.]]> 2018-11-09 09:11:48 UTC https://padlet.com/callum01/tcf9eu7kc29g/wish/302469190 callum01 https://padlet.com/callum01/tcf9eu7kc29g/wish/302469191 One characteristic of a smooth flowing data management system is a simple, easy-to-follow, understandable structure.]]> 2018-11-09 09:11:48 UTC https://padlet.com/callum01/tcf9eu7kc29g/wish/302469191 callum01 https://padlet.com/callum01/tcf9eu7kc29g/wish/302469202 a) One reason why the organisation may choose to use internal information is because it may be more reliable than external information, and there is less chance of the information being biased, inaccurate, or unreliable- as external information can sometimes be.  

b) One reason why the organisation may choose to use external information is because the external data may explain an issue that internal information may not have recognised, and give a different viewpoint on things.]]> 2018-11-09 09:11:48 UTC https://padlet.com/callum01/tcf9eu7kc29g/wish/302469202