Sibling relationships help us make sense of similar opportunities like “I want to watch my shows on my flight” and “I want to watch my shows on my train commute.” We can easily depict both on our tree under the parent opportunity “I want to watch my shows on the go.” This allows us to treat each context (e.g., plane, train) as a specific need to address, while also visualizing the similarities. They are both sub-opportunities of the same parent.
