DSM employs a multi part methodology which is documented as follows:

Data Audit
Prior to any work undertaken it is suggested that a complete data audit of the client's data is done. This can be done internally by the client or an agent of the client and the results provided to DSM; or DSM can come into the client's premises and personally assist with conducting the audit.

Initial Pilot Study

An initial study of the Geometrical Asset Data owned by the organisation and its applications needs to be carried out before processing the data. This study will help in understanding the constraints or geometrical rules that will have to be applied when processing the data. The pre-processing report that identifies the rules to be applied by the constraint engine, is approved by the client before full scale implementation of the process.

Pre-processing
Often it is found that the user data is not always topologically correct prior to PAI.  After the initial study of the data, a report will be prepared on Geometric Rules and constraints existing in the asset data. This report will also indicate whether or not cleaning of the data is required prior to PAI realignment.  The following issues will be addressed:

Orientation

	Dimension
	Offset(Parallelism)
	Snapping (both to OS Base data and also between user data layers)
	Other user defined constraints

If required and in agreement with the client, DSM will process the data prior to doing the PAI shifting. This usually involves snapping data to OS (pre-PAI) base data where required. Once the pre-PAI client data is topologically correct it is then processed through the Alchemy automatic correction application

DSM are accredited to ISO quality standards and all data would be passed though strict quality assurance checks prior to delivery to the client.