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1.1.5

Evaluate alternative installation processes.

 

Teaching Note:

Students should be aware of the methods of implementation/conversion.

Parallel running, pilot running, direct changeover and phased conversion.

S/E Training issues may require organizations to restructure their workforce.


Sample Question:

From Sample Paper 1 2014:

sample paper question

This continues on, with question (c) to Assessment Statement 1.1.6.

 

JSR Notes:

 

There are four general strategies to implement a new system.

Examples of IT systems implementation to get you thinking about certain situation and which would be best:

- Switching from Windows to Mac at a school.

- A new payroll system outsourced at a department store.

- Wired to wireless network at a bank.

- Navigation systems introduced for a taxi company.

 

Direct Changeover

This is the "Big Bang" changeover - out with the old, in with the new all at once; i.e. the immediate and full replacement of a system.

Advantages:

Disadvantages / Potentially Negative Implications:


Pilot Running

This is when the new system is introduced to certain parts of a business or organization only. Often for such a pilot program, individuals or departments are canvased to volunteer to try the new system to see how it works. It is important to note that just because it works well on a limited scale, it may not on an organizational level, but by starting with a limited scope, it can be easier to implement and isolate pitfalls and potential problems.

Advantages

 

Disadvantages / Potentially Negative Implications:

 


Parallel Running

With parallel running a new system is introduced alongside the current or old system. So both are running at the same time for a matter of some time until the new system is able to "stand on it's own two feet".

Advantages:

 

Disadvantages / Potentially Negative Implications:

 


Phased Conversion

This is the gradual replacement of parts of the old system with parts of the new system one part at a time, until finally the new system is completely introduced.

Advantages:

 

Disadvantages / Potentially Negative Implications:

 

Now getting back to the assessment statement and the teaching note. You will probably not be asked to define the above changeover strategies, but rather apply your knowledge of them by comparing them, and likely in a specific context. So, for example, with our region-wide hospital database example, which of the strategies would be best, and what specific advantages and disadvantages would be associated with each.

And from the teaching note (teaching notes are often a really good hint for a potential question) what training issues would be involved in the specific changeover, and how would the overall workforce have to be restructured?

So in terms of evaluating, and back to the situations introduced at the beginning:

(a.) Which kind of implementation do you think would be best for each of the following, and why?
(b.) What training issues may be required to restructure their workforce?

- Switching from Windows to Mac at a school: (a.) _________________, (b.) _________________

- A new payroll system outsourced at a department store: (a.) _________________, (b.) _________________

- Wired to wireless network at a bank: (a.) _________________, (b.) _________________

- Navigation systems introduced for a taxi company: (a.) _________________, (b.) _________________

 

Finally, a summary video from YouTube:

WikiBooks.org **