1) Goals-based planning is probably the most common and starts with focus on the organization's mission (and vision and/or values), goals to work toward the mission, strategies to achieve the goals, and action planning (who will do what and by when).
It is not meant to just be built after determining a product’s strategy.
We have more than 100 current international development projects worldwide, including projects in Iraq, Jordan, Afghanistan, South Sudan, Pakistan, Colombia, Paraguay and Kenya.
The Consultants Development Institute's Series Facilitating Strategic Planning provides free online courses, downloadable tools and interaction with faculty to learn the core skills to facilitate strategic planning for any kind of organization. Most of the information in this topic was adapted from the book Field Guide to Nonprofit Strategic Planning and Facilitation.
You should essentially be living in that document all the time — reviewing it, updating it, re-examining its goals and deadlines in light of new realities in your company and in the market.
Bottom line: You should be spending a good portion of your day in your product roadmap.