Software is developed in teams so design decision must be done collaboratively.
Links
Book: Jitske Kramer - Jam Cultures: About Inclusion; Joining in the Action, Conversation and Decisions
Book: Sam Kaner - Facilitator’s Guide to Participatory Decision-Making
Book: Thomas Wedell-Wedellsborg - What’s Your Problem?: To Solve Your Toughest Problems, Change the Problems You Solve
Blog: Rebecca Wirfs-Brock: Architecture Decisions Should Be Made At the Last Responsible Moment
Sketchnote: Dale Carnegie: How to Win Friends and Influence People