The best companies build quality assurance systems into their practice.

What separates great builders from good ones? Many things do, but part of the answer is that great builders are obsessive about small details. And taken together, those small details leave a big impression.

Most builders truly want to do good work for their customers. They strive to craft high-quality homes and respond quickly if the customer has a serious problem like a leak after move-in. At the same time, many builders lack formal systems for finding and correcting small errors during construction and for making sure they don’t happen in the future.

Unfortunately, those small errors generate a lot of complaints. These range from minor comfort issues (such as anemic airflow from a heat vent) to annoyances (a squeaky stairway tread). But issues like these aren’t minor to homeowners—they play a big part in how happy customers are with their new home.

Industry research has found that builders who avoid problems that cause unhappy homeowners are systematic about quality.

A recent article in Professional Builder magazine noted that most builders around the United States lacked formal quality assurance (QA) programs, but those who had put a QA program in place were quickly rewarded with steep reductions in warranty claims. One builder reported 70 percent fewer claims after just two years.

It’s no surprise that those builders’ customers are also more likely to refer them to friends and family.

So what does a QA program include? Most people assume it’s all about inspecting the work, but while inspections play a big role they’re not the whole story. Someone in the company needs to review the data from every inspection and make sure the underlying issues get corrected. In other words, QA is a proactive way to help the builder achieve ongoing quality gains.

There’s no “right” way to implement QA—you can buy special software, but simple checklists can be just as effective.

Ultimately, it comes down to a mindset and a commitment.

The mindset shows up in a lot of ways. For instance, quality-driven builders have clearly written and communicated expectations for workers and trade contractors, and they are diligent about making sure those expectations get met. They tend to have clutter-free job sites with neatly stacked materials—signs of an efficient and safety-conscious company that pays attention to detail. They also have a protocol for identifying trends, so if a new crew is having trouble flashing the windows correctly, the site manager will quickly find out and get them up to speed.

The Professional Builder article also reported that builders who reap the most rewards from their QA efforts pursue collaborative relationships with trade contractors and seek their advice on continuous improvement. This helps build a company culture that encourages excellence—a culture that attracts contractors and employees who do the best work.

The end result is more satisfied customers. And since so few builders have systematic QA programs, the ones who do stand out. They’re the builders you want to work with for your dream custom home.