Legacy System Management - The Four Strategic Options

Four Strategic Options for Legacy Systems

1 pts

volume_mute

Which of the following are the four recognized strategic options for evolving a legacy system? Select all that apply.

Outsource all decisions to the original hardware vendor permanently

Reengineer the system to improve its maintainability

Scrap the system completely

Leave the system unchanged and continue with regular maintenance

Replace all or part of the system with a new system

Ignore the system and hope it fixes itself

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When to Scrap a Legacy System

1 pts

volume_mute

Under what condition should the 'scrap the system completely' option be chosen?

When the original developers have won an industry award for the system's design

When the system has just been purchased and is brand new

When the system is not making an effective contribution to business processes, often because business processes have changed and no longer rely on it

When the system has extremely high business value and high quality

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When to Leave a System Unchanged

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Under what condition should the 'leave the system unchanged and continue with regular maintenance' option be chosen?

When the system is still required but is fairly stable and users make relatively few change requests

When the system has been completely scrapped already

When the system has zero remaining business value

When the system requires a complete architectural rewrite immediately

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When to Reengineer a System

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Under what condition should the 'reengineer the system to improve its maintainability' option be chosen?

When a brand new off-the-shelf replacement is available at zero cost

When the system is no longer used by anyone in the business

When the system quality has been degraded by change, but new change is still being proposed for the system

When the original source code has been completely lost with no backups

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When to Replace a System

1 pts

volume_mute

Under what condition should the 'replace all or part of the system with a new system' option be chosen?

When the system has no users whatsoever and never has had any

When the system was developed less than six months ago

When the business has decided to never invest in technology again

When factors such as new hardware mean the old system cannot continue, or off-the-shelf systems allow reasonable-cost replacement

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Evolutionary Replacement Strategy

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volume_mute

What is an evolutionary replacement strategy in the context of legacy system replacement?

Major system components are replaced by off-the-shelf systems while other components are reused wherever possible

The entire system is replaced overnight with zero testing of any kind

The system is replaced exclusively using genetic algorithms to generate new code

Only the user interface is ever changed, while all backend logic remains forever

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Matching Strategic Options to Scenarios

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Match each described scenario to the most appropriate strategic option for legacy system management.

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Scenario

An order processing system that works well and receives only occasional minor change requests

A customer database system that is heavily relied upon but whose code has become very difficult and costly to modify after years of patches

A payroll system that business processes no longer use because operations moved entirely to a third-party cloud payroll provider

An inventory system running on hardware that the manufacturer has discontinued and can no longer be supported

Option

Replace the system

Reengineer the system

Leave unchanged with regular maintenance

Scrap the system completely

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Four Strategic Options for Legacy Systems

Correct Answer

Explanation

When to Scrap a Legacy System

Correct Answer

Explanation

When to Leave a System Unchanged

Correct Answer

Explanation

When to Reengineer a System

Correct Answer

Explanation

When to Replace a System

Correct Answer

Explanation

Evolutionary Replacement Strategy

Correct Answer

Explanation

Matching Strategic Options to Scenarios

Scenario

Option

Correct Answer

Explanation

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