Collection and use of information Flashcards
(35 cards)
why should a formal IT strategy be set?
info system is adaptive and open
entity exists in a dynamic environment
info needs are constantly changing
entity relies upon info system in order to construct its strategic plan
info system and info tech can help entity have a competitive advantage
what are the benefits of a formal IT strategy?
goal congruence of info system and corporate objectives
entity is more likely to be able to create and sustain a competitive advantage
high level of expenditure on info systems will be more focused on supporting key aspects of the business
developments can be exploited at most appropriate time - not always when first available
what is the difference between IT, IS and IM?
IS = information system strategy. looks at way in which info systems are organised through org
IT = info tech, looks at tech infrastructure of the systems
IM = info mgment, looks at how systems support mgment processes
‘information systems strategy’ is used to encompass all three of these.
how fluid should an IS strategy be?
unlikely strategy remains unchanged for significant periods, may need amending because of changes in org objectives, development of new tech, update of existing tech, change in number of employees and therefore scope changes.
whatever reason for change, important that some formal process is followed to ensure objectives remain aligned. in worst case, IT dept may decide that some new tech is useful and implement this, however if doesn’t support overall objectives it may not operate successfully.
what is the general strategy to follow when info systems require amendment?
determine business strategy
amend IS strategy
develop and implement system
amend the system
review the strategy
how should you determine the business strategy and amend the IS strategy when amending info systems?
determine business strategy
IT strategy must support this and not drive it. new systems may not be compatible with other software or hardware used in the entity. additional checks will be necessary to confirm compatibility.
amend IS strategy
may have impact on other sections. if suddenly in a new format it may no longer be accessible by other divs or branches. amendments must be checked against business plan and individual requirements across org divs
how should you develop/implement/amend the system and then review the strategy when info systems require amending?
develop and implement system
having decided to go for it, plan will be developed for implementation. alternatives and methods may need to be considered. choice will be between in house development or outsourcing.
amend the system
checks may be required to ensure everyone stays informed. advertising change has taken place will be essential particularly where change will result in some competitive advantage
review the strategy
ensure objectives met. if not, further review may be required
how should info system performance be assessed?
cost benefit analysis
tends to focus on costs/benefits derived from accounting system. with many of costs and benefits being intangible, may not form a suitable way of assessing the value of information.
what are the limitations of cost-benefit analysis on info systems?
which tangible costs should be included?
most entities have a network of some kind so distributing info not a problem but increase in network traffic may mean bandwidth needs updating etc, so which project will pay for this?
how can intangible costs be measured?
many arise not from having info available, e.g. lack of info resulting in incorrect decisions being made. issue is how to measure cost of not having info around.
what are the limits to benefits from improving information systems?
some of benefits of enhanced info systems can be seen in terms of quality of information provision improvements, e.g. speed. hard to value this. significant diminishing returns to this provision. providing info in 0.2 seconds rather than 2 is minimal, but 2 secs rather than 20 is much more valuable.
how can intangible benefits be measured?
enhanced info may be provided by a new system. additional info may improve customer service, gain comp advantage, and these benefits may take a long time to accrue. time will be taken for historical analysis to build up to any meaningful level. traditional measures of CBA such as payback or ROI may be inappropriate.
how can you deal with the limitations of cost-benefit analysis when assessing info system performance?
- ignore the benefits - if ignore those too difficult to quantify, systems almost always appear to have negative cash flow effects. obviously misleading, so this would be meaningless
- quantify the benefits - can attempt to take each of benefits and turn it into cash flow estimate. two issues: rationale and assumptions may be disputed and it will be difficult/impossible to post audit the system to prove the claimed benefits have been realised.
- change the approach - best approach is to recognise and accept qualitative nature of benefits and find a reasonable non-financial way of assessing them. may lead to an evaluation such as one displayed in table. non-financial benefits could be assessed through information audit, but again must decide means of measurement in there anyway.
how should costing a new system be split?
initial costs - design, development, purchase price, purchase of new hardware, testing and implementation, training
running costs - labour time to run system, materials e.g. replacement parts, service support.
what are the costs of internal/external info?
costs of internal info = direct data capture costs (e.g. barcode scanners in supermarkets), processing costs (e.g. salaries paid to payroll staff), indirect costs (info collected where unneeded or duplicated)
costs of external info = direct costs (newspaper subscriptions), indirect costs (wasted time finding useful info), management costs (cost of processing info), infrastructure costs (systems enabling internet searches)
what are the indirect costs of producing info?
training (most costly), loss of staff morale, delays caused to other projects, general dislocation caused by system change, upsetting customers from systems change, incompatibility with other systems, unexpected costs of software amendments, tailoring and maintenance, cost of failure due to inappropriate systems, reduced quality or poor decision making due to info overload, too many areas focused on not enough detail, focus on wrong things.
what are the risks of info processing facilities?
dissatisfied employees might deliberately modify/destroy info
hacker or industrial spy might break into the system
viruses or malicious software could be introduced
accidental mistakes made on input to the system
inadequate security of hardware or data
faults in hardware system
risk of hardware theft
physical damage to hardware
damage to data
operational mistakes
fraud and industrial espionage
breaches in legislation
what are the 5 types of viruses?
trojans - carry on one program and secretly another
worms - replicate themselves in system
trap doors - undocumented entry points to systems allowing normal controls to be by-passed
logic bombs - triggered on occurrence of certain event
time bombs - on certain date
what is big data? what is the key challenge?
Big Data refers to volumes of data which are so large that they far exceed the normal capturing, processing, storage and analysis capacity of typical database application tools.
key challenge in dealing with big data is to identify repeatable business patters in unstructured data, significant quantities of which are in text format
what sort of sources can big data come from?
Telemetry from consumer and commercially operated vehicles
Financial market data
Social network traffic
Web server logs
Traffic flow monitoring
Satellite imagery
GPS tracking
Government documentation
Web pages content
Audio downloads
Banking transactions
Streamed audio content
what are the four vs of big data?
- volume - more sources and increase data generation. data analytics software has enabled processing of these large datasets.
- velocity - streaming at constant rate and current processing servers are unable to cope with this and generate meaningful real time analysis
- variety - traditionally data was structured and in similar and consistent formats such as spreadsheets and standard databases. can now be generated and collected in huge range of formats
- veracity - concerned with truthfulness of data collected. because of so many difference sources, increased risk of inaccuracies. for data to have any value when being used for decision-making, needs to be truthful. this means it must not present a bias or contain inconsistencies. use of poor quality data may have expensive and far reaching consequences for those orgs which rely on it for making strategically important decisions. an org may decide to introduce a new type of product in belief that there is sufficient customer demand for it, which may not be the case.
what is analytics vs mgment of big data
analytics -
process of scrutinising big data to identify patterns, correlations, relationships and other insights. can have wide reaching effect on orgs strategy and marketing campaigns and can therefore have a direct impact on future profitability. can make detailed profiles of customers.
management -
storage, administration and control of vast quantities of both structured and unstructured data. main aim of big data is to ensure that data stored is high quality and accessible. new tech combines traditional data warehouses with big data systems in a logical data warehousing architecture. some sources may not fit into currently available data sources and big data analytics may require more advanced software tools, so open source tech such as Hadoop are increasingly utilised to manage constantly evolving data processing requirements of big data.
what are the benefits and risks of big data?
benefits: driving innovation through automation, gaining competitive advantage, improving productivity
risks: rapidly developing systems result in limited availability of skilled resources who can operate them effectively. data security becomes ever more difficult and without investment in resources to manage data security, risks may arise from potential leaks/losses. meeting data protection obligations while collecting increasing amounts of data
what is BI?
BI is often used to describe technical architecture of systems that extract, assemble, store and access data to provide report and analytics. can also be used to describe reporting and analysis applications or tools at top of this ‘stack’ but BI not just about hardware and software. company wide recognition that company’s data is an important strategic asset and can yield valuable mgment info to improve decision making
what is a BI system?
BIsystems provide management accountants with a wider range of information in more accessible formats. In addition to reporting and monitoring, BI systems can provide more forward-looking analysis based on a combination of both financial and non-financial information.
what is the aim of BI?
Business intelligence is about improving decision making. It involves developing processes and systems that collect, transform, cleanse and consolidate organisation wide and external data, usually in an accessible store (a data warehouse), for presentation on users’ desks as reports, analysis or displayed on screens as dashboards or scorecards. The term BI is sometimes used to describe this structure or ‘stack’ of software systems and applications.
what is a typical BI ‘stack’?
The typical BI ‘stack’ or architecture can be represented as having a series of layers. The base is usually shown as source data systems from where data is extracted, translated and loaded by extract, transform and load (ETL) software into a data warehouse. Above this is an application layer (or BI layer) and on top of this the presentation or delivery layer which can include executive dashboards, scorecards and other tools that make it easier for managers to find and understand the information and proactively use it in decision making