Boeing CEO Jim McNerney told employees on Tuesday that while the production strategy for the 787 Dreamliner is fundamentally sound, the company expects to modify its approach somewhat on future programs.

McNerney wrote to employees Monday saying that Boeing had been innovative in creating the advanced commercial jetliner, according to a company memo published by the Seattle Times on Tuesday.

However he added that the execution of the business model and oversight of the supply chain had been much more of a challenge.

The global-partnership model of the 787 remains a fundamentally sound strategy, he said, noting the model which calls for building different parts of the plane around the world and assembling them in the U.S.

But we may have gone a little too far, too fast in a couple of areas, he added. I expect we'll modify our approach somewhat on future programs, he added.

McNerney also acknowledged that the company's struggles to execute comes at a price, specifically impacting customer relationships.

He said that the company is setting more conservative milestones, noting that more delays would burden customers.