Extending your product development process by integrating portfolio and project management is a light and effective way to introduce these concepts to the highly technical-driven organization.
Many organizations maintain this integration by relying on project and product managers with the right combination of technical, business, and interpersonal skills, but employing this approach alone is not easily scalable.
Stage-gate review meetings are a good place to integrate portfolio reviews into the product development process.
Planning each project stage as a distinct subproject ensures that outputs from the stage-gate/portfolio review get integrated into the detailed plans for the next stage.