Scott W. Ambler and Mark Lines are cocreators of PMI Disciplined Agile and authors of several books about agile approaches. They have decades of experience implementing agile and lean approaches at organizations around the world and are both sought-after keynote speakers. Scott W. Ambler and Mark Lines are cocreators of PMI Disciplined Agile and authors of several books about agile approaches. They have decades of experience implementing agile and lean approaches at organizations around the world and are both sought-after keynote speakers. Scott W. Ambler and Mark Lines are cocreators of PMI Disciplined Agile and authors of several books about agile approaches. They have decades of experience implementing agile and lean approaches at organizations around the world and are both sought-after keynote speakers. Scott W. Ambler and Mark Lines are cocreators of PMI Disciplined Agile and authors of several books about agile approaches. They have decades of experience implementing agile and lean approaches at organizations around the world and are both sought-after keynote speakers.