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Guide S35 -- Management Guide to Custodianship
The process of building and maintaining a corporate database is complicated and takes a lot of cooperation and coordination between the areas of the ministry that are custodians of information and applications. This section will describe the process that is required to develop and maintain the corporate database while developing and maintaining the applications that work on the corporate database. Any change to or deletion of a data structure in the corporate database needs agreement and planning by all the custodians of applications that access that data.
Note: What is likely to happen in the Information Access scenario is that a user may discover that some data they require is not available or is not defined as they require it. The process for resolving issues triggered by Information Access will be the same as described below except that since the issue will not have come to light during a project, the issue will be referred to the Data Custodian to initiate discussions.
All changes to data stem from ministry policy/procedures, which means that a change in one policy/procedure that causes a data change in the corporate data model may also require change(s) to other policy/procedures.
Any addition, deletion, change in size, or change in definition to a piece of data in the corporate data model has the potential to affect every application that uses the corporate data model, whether the applications use that particular piece of data or not.
Depending on what the change is to the piece of data in the corporate data model, the scope of change(s) required to applications and policy/procedures may be small, very large, or somewhere in between. The only way to understand the scope is for the Data Custodians and Application Custodians to have the policy/procedures and the applications analyzed. The effect of the changes must be analyzed with regard to the ministry as a whole on the basis of cost, timeframe, effort required, and the effects on people and the business.
Funding for maintenance of and enhancement to the ministry's applications comes out of STOB 25 (program Branch or Operations Division responsibility centres). The Application Custodian is responsible for funding maintenance and enhancements for their applications; in addition, an Application Custodian who creates a change must ensure other affected Custodians are able to fund any changes they would then require. If not, it is the creator who must either escalate the funding problem or fully support its escalation, including informing the Director, Information Systems.
***Roles matrix not available in HTML format at present***
The process flow diagram [12kb] shows a general procedure for implementing change within a modelling or systems development project. (Note: in May 1997 the definition for "Data Resource Manager" changed to mean staff who collect and manage data, and the term "Data Standards Manager" began to be used for the Data Custodian's staff help. This diagram has not yet been updated with "DSM" wherever "DRM" is displayed, so when you see DRM, it really means DSM!)