This document introduces the Product Engineering Maturity Model (SPEC), which is designed to help distributed product engineering teams improve through a guided maturity model approach. It discusses the need for such a model to help teams continuously improve how they deliver products and address challenges around agility, quality, and competitiveness. The SPEC model focuses on engineering discipline, business focus, team building, and engagement strength. It provides examples of key areas and levels within the model, along with practices for areas like "Visible Quality" and "Relationship Management". The document describes how to use the model through gap analysis, backlogs, and audits to create a disciplined culture and make continuous improvements over time.