The Good Enough Principle
98% accuracy IS perfection -- the final 2% costs more than it is worth
The Good Enough Principle establishes that in the vast majority of business and life situations, 98 percent accuracy is the operational definition of perfect. Pursuing that final 2 percent triggers the law of diminishing returns -- the extra energy required for marginal improvement is itself an imperfection because that energy could produce far greater returns elsewhere.
This is not a license for mediocrity. It is a strategic resource allocation principle. Unlike brain surgery, Olympic competition, or world-class chess where absolute precision matters, most business processes reach their optimal efficiency point well before total perfection. The goal is to produce consistently excellent work at speed, then move on to optimize the next system.
Carpenter illustrates this through the parable of two land surveyors given similar assignments. One pursues extreme accuracy beyond what is needed and takes four days. The other matches the accuracy to the actual requirements and finishes in one day at one-quarter the cost, with results that fully serve the client's needs. The over-precise surveyor wastes time and money chasing unnecessary accuracy.
- 98% accuracy IS perfect for most business situations
- The energy needed for the final 2% could produce better returns elsewhere
- Match accuracy requirements to the actual purpose of the task
- Getting a process 'too perfect' is shortsighted and counterproductive
- When it comes to work: get in, do the work, and get out
- Define the Accuracy RequirementBefore starting any task, explicitly determine the level of accuracy and quality that is actually required by the situation. What does the client, customer, or stakeholder actually need? This prevents defaulting to maximum precision on everything.
- Execute to the Required StandardFocus your energy on producing excellent work that meets the defined standard. Work with intensity and focus. Do not combine working and relaxing -- when you work, work fully. Produce consistently excellent output at the standard you have defined.
- Recognize the Diminishing Returns PointDevelop awareness of when you have hit 98% quality and are entering the zone of diminishing returns. Notice the signals: each improvement takes exponentially longer, the differences become imperceptible to the end user, and you are polishing for your own satisfaction rather than practical benefit.
- Release and Redirect EnergyComplete the task and move on. Redirect the energy you would have spent on that final 2% toward the next system that needs improvement. Over time, the compound effect of improving many systems to 98% vastly outperforms perfecting one system to 100%.
Two land survey party chiefs, Ben and John, are given similar parcels to survey. Ben decides his survey requires measurement to the nearest hundredth of a foot using sophisticated equipment, taking four days at a cost of $800. John assesses that the landowner needs a general sense of boundaries, uses simpler methods matched to actual requirements, and completes his survey in one day at $200.
Carpenter drew this principle from his background in land surveying and construction management, where he learned early that the degree of accuracy must match the actual requirements of the job. He was taught through the parable of two party chiefs -- Ben and John -- whose contrasting approaches to the same survey project demonstrated that excessive precision is not virtue but waste. He applied this principle throughout Centratel's systematization, ensuring that procedures were optimized for practical excellence rather than theoretical perfection.