Evolution vs. Servicing - Lifecycle Phases

The difference between the evolution phase (major changes) and servicing phase (small essential changes) in a system's life, and what happens at retirement.

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Views #: 202

Questions #: 8

Time: 10 minutes

Pass Score: 80.0%

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Evolution Phase Definition

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In the evolution and servicing lifecycle model, what characterizes the 'evolution' phase of a software system?

The system is permanently taken out of use and replaced

Only small, essential tactical changes are made to keep the system running

No changes of any kind are permitted to the software

Significant changes are made to the software architecture and functionality

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Servicing Phase Definition

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What characterizes the 'servicing' phase of a software system's lifecycle?

The system receives its very first release to customers

Only relatively small but essential changes are made to the system

All historical bugs are simultaneously fixed in a single large release

Major architectural redesign is undertaken to add new functionality

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Why Systems Transition from Evolution to Servicing

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Why does a software system typically transition from the evolution phase to the servicing phase?

Government regulation requires all software to enter a servicing phase after exactly five years

As the software is modified repeatedly, its structure degrades, making significant changes progressively less cost-effective

The original developers always quit once a system reaches the evolution phase

Servicing is required before software can legally be sold to customers

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Order of Software Lifecycle Phases

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Please drag and drop the options to sort them

Arrange the four phases of the software lifecycle in the correct chronological order, from first to last.

Software retirement

Software development

Software servicing

Software evolution

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Overlapping Lifecycle Phases

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True or False: The development, evolution, servicing, and retirement phases of a software system have sharp, non-overlapping boundaries, with one phase ending completely before the next begins.

True

False

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Behavior During the Final Stage Before Retirement

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What typically happens to a software system in the final stage before it is retired?

The system receives a complete architectural overhaul to extend its life indefinitely

All users are immediately migrated to a replacement system with zero transition cost

Only essential changes are made, and users have to work around problems they discover

The system is given new functionality to compete with modern alternatives

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Costs Associated with Retirement

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What additional cost is often incurred when a software system is finally retired?

A mandatory licensing fee paid to the original software vendor

A one-time tax imposed on retired enterprise software

The cost of training all users on the retired system one final time

The cost of transferring data from the old system to a newer replacement system

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Classify Lifecycle Activities

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Activities

×A major new module is added that changes the system architecture

×A small patch is applied to fix an urgent but minor issue

×Data is migrated to a new platform and the old system is shut down

Evolution

Servicing

Retirement

Classify each described activity into the correct lifecycle phase.

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Undergraduate Professional

Evolution Phase Definition

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Servicing Phase Definition

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Why Systems Transition from Evolution to Servicing

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Explanation

Order of Software Lifecycle Phases

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Explanation

Overlapping Lifecycle Phases

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Behavior During the Final Stage Before Retirement

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Costs Associated with Retirement

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Classify Lifecycle Activities

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