Mapping Architect for Visio can be installed when you install the PowerCenter Client. With Mapping Architect for Visio, you can create a mapping template using Microsoft Office Visio. A mapping template is a diagram that you use to represent objects in a PowerCenter mapping. You can use Mapping Architect for Visio mapping templates to provide consistency and improve productivity in the following cases:

• Define consistent methodology and structure for data integration projects : Use mapping templates to standardize error handling or slowly changing dimension mappings. Distribute mapping templates to developers working on data integration projects to share best practices, standards, and special techniques. In addition, after an implementation is complete, developers can reuse mapping templates for similar projects.
• Generate multiple mappings at one time : Use one mapping template to generate multiple mappings that have similar structure. For example, create a mapping template that includes the basic design and uses rules and parameters to define the extraction logic. When you use the mapping template to create multiple mappings, you can specify different values for the parameters. You can use parameters to define data sources, transformation properties, port names, expressions, and other elements that comprise a mapping.
• Document data flow : Use mapping templates to document methods to map or process data.

Download samples here and learn the concepts of creating Mapping templates using Visio.1.  Visio Template : Incremental UpdateAutomatically generate PowerCenter mapping that performs incremental update using PowerCenter Mapping Architect for Visio.2.  Visio Template : AutoMap Flat File DataAutomatically generate PowerCenter mapping that captures identical data from varying file formats where order of columns change.3.  Visio Template : Data Type Driven TransformationAutomatically generate PowerCenter mapping that removes duplicate records using PowerCenter Mapping Architect for Visio.4.  Visio Template : Remove Duplicate RowsAutomatically generate PowerCenter mapping that removes duplicate rows using PowerCenter Mapping Architect for Visio.5.  Visio Template : SAP ExtractAutomatically generates PowerCenter mapping that help to automate the  creation of targets for SAP sources with port name in English based on  German to English column mapping.6.  Visio Template : Data Migration Staging MappingAutomatically generate PowerCenter mapping to stage legacy source data  used in Data Migration projects using PowerCenter Mapping Architect for  Visio.7.  MapGen PlusMapGen Plus is a combination of tools and utilities that can help you generate multiple mappings in few seconds.