The Coca-Cola Company
New Coke Reformulation Disaster
Estimated impact: $30M+ in marketing costs; temporary market share loss (ultimately recovered)
Coca-Cola replaced its 99-year-old formula with "New Coke" based on blind taste tests showing preference for a sweeter formula. Consumer backlash was immediate and fierce. The company reversed course within 79 days, reintroducing the original as "Coca-Cola Classic."
Decision context
Whether to replace the world's most iconic beverage formula based on taste test data, without accounting for brand attachment, nostalgia, and cultural identity tied to the original product.
Biases present in the decision
Toxic combinations
- Echo Chamber
- Blind Sprint
Reference class base rates
Across all 146 curated case studies in our library:
Lessons learned
- Framing the decision as a taste preference ignored the emotional and cultural relationship consumers had with the Coca-Cola brand
- Blind taste tests measured sensory preference in isolation but failed to capture the holistic brand experience
- The speed of reversal (79 days) showed the company could correct course, but the damage to trust was real
Source: Thomas Oliver, "The Real Coke, The Real Story" (1986); Coca-Cola Company archives (Case Study)
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