The PERA Life-cycle Model, and the PERA Master Planning Methodology are not proprietary, and are intended for free use by as many people as possible. Copyright notice should be included when when using these materials, but there is no charge, and no permission is required.
The Fluor Daniel implementation of PERA includes certain documentation, workflows, and reference materials which were developed to facilitate application of PERA concepts, and to merge these with Fluor Daniel engineering practices. These are used on Fluor Daniel projects and provided to their clients, but are not in the public domain. Contact Gary Rathwell at Enterprise Consultants for more information.