IB SL Computer Science
Quarter 1
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Notes
What are computer science and computer
● Computer science: a branch of science that deals with the theory of computation or the
design of computer systems. (Merriam-Webster Dictionary, 2015)
● A computer is something that takes input, processes it, and then outputs something.
1.1 Systems in organizations
1.1.1 Planning a system
● A new, better system can be created in order to replace an old system
○ The old one could be
■ Inefficient
■ Redundant
■ Outdated
■ No longer suitable
● A computer system contains
○ Hardware
○ Software
○ User
○ Immediate environment
● Updating a system might require training to use the new system
,● Planning is the process of thinking about the details
○ It should anticipate
■ lack of guiding organizational and business strategies
■ lack of stakeholder and end—user participation
■ lack of end-user 'ownership' of system
■ lack of attention to required training
■ lack of attention to various organizational issues, such as organizational
culture
■ lack of attention to the design of tasks and jobs, allocation of information
system tasks, and the overall usability of the system.
○ It should consider the
■ Context
■ Extent of new system
■ Limit of new system
● Feasibility report
○ Evaluates a project and its potential
○ Used to decide if the project should be continued
, 1.1.2 Change management
A large company has taken over another business. This takeover has required various changes to
be made. One of the changes requires data migration.
Other than data migration, describe two aspects of change management that may arise from
this takeover.
Issues like employees might now need training or there is a dislike of the new system.
The new system may be incompatible with the old data.
● Change management is the process of shifting things into a desired state.
● It has a lot of parameters
● A successful one guarantees that all stakeholders like the changes
● Tries to maximize benefits and minimize negative impacts.
● Employee might need training for when something is changed
● New computerized system might threaten some people’s jobs position
What could go wrong?
● Old hardware not good enough
● Network problems
● No training or not enough
● Interruption to lives of workers/customers
● Staff/users don’t like it at first
● Incapability of software functionality
● Security
Quarter 1
___
Notes
What are computer science and computer
● Computer science: a branch of science that deals with the theory of computation or the
design of computer systems. (Merriam-Webster Dictionary, 2015)
● A computer is something that takes input, processes it, and then outputs something.
1.1 Systems in organizations
1.1.1 Planning a system
● A new, better system can be created in order to replace an old system
○ The old one could be
■ Inefficient
■ Redundant
■ Outdated
■ No longer suitable
● A computer system contains
○ Hardware
○ Software
○ User
○ Immediate environment
● Updating a system might require training to use the new system
,● Planning is the process of thinking about the details
○ It should anticipate
■ lack of guiding organizational and business strategies
■ lack of stakeholder and end—user participation
■ lack of end-user 'ownership' of system
■ lack of attention to required training
■ lack of attention to various organizational issues, such as organizational
culture
■ lack of attention to the design of tasks and jobs, allocation of information
system tasks, and the overall usability of the system.
○ It should consider the
■ Context
■ Extent of new system
■ Limit of new system
● Feasibility report
○ Evaluates a project and its potential
○ Used to decide if the project should be continued
, 1.1.2 Change management
A large company has taken over another business. This takeover has required various changes to
be made. One of the changes requires data migration.
Other than data migration, describe two aspects of change management that may arise from
this takeover.
Issues like employees might now need training or there is a dislike of the new system.
The new system may be incompatible with the old data.
● Change management is the process of shifting things into a desired state.
● It has a lot of parameters
● A successful one guarantees that all stakeholders like the changes
● Tries to maximize benefits and minimize negative impacts.
● Employee might need training for when something is changed
● New computerized system might threaten some people’s jobs position
What could go wrong?
● Old hardware not good enough
● Network problems
● No training or not enough
● Interruption to lives of workers/customers
● Staff/users don’t like it at first
● Incapability of software functionality
● Security
