Information Technology Reference
In-Depth Information
Planning comprises the following elements:
• Time schedule,
• Resources: personnel and hardware,
• Organisational structure,
• Migration procedure,
• Documentation,
• Acceptance,
• Putting into operation.
Special emphasis is to be placed on the following details:
• Assignments of responsibilities (business units/IT/project),
• Clear description of tasks,
• Clear description of the migration objects,
• Risks concerning external impact regarding possible data problems,
• Assurance of the availability of team members,
• Budget,
• Definition of acceptance criteria.
Prior to the first data upload the following pre-conditions have to be met:
• Drafting of functional specifications,
• Identification of the exiting data base,
• Clean up of the exiting data base with regard to inconsistencies, erroneous data
and redundancies,
• Logical match between old and new data structures,
• Technical specification for the adjustment program,
• Specification for the system configuration for the data bootstrap,
• Definition of fall back scenario,
• Initial data controlling,
• Timely request for additional data, for example for customising,
• Provisioning of test system,
• Customising of migration system,
• Provisioning of data bootstrap interface,
• Test of data bootstrap interface.
After data bootstrap the result has to be validated. This comprises an intensive
quality check of the uploaded data. This check has to be executed under the
responsibility of the sub-project with the assistance of competent members of the
business units concerned if necessary.
A gross plausibility check is delivered by the rejection rate of the data to be
loaded. If the rate is under a pre-defined threshold the data bootstrap is regarded as
successful. Subsequently two more types of checks should be carried out:
• Random sampling of the new data base with regard to correctness,
• Analysis of the rejected data records for possible reasons.
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