SILVERSTONE, England -- The Jordan Formula One team has cut its staff by 15 percent, including its managing director, head of engineering and chief operating officer.

Jordan drivers Giancarlo Fisichella and Takuma Sato have failed to win a point in the four Grand Prix races held so far. Last year, Jordan finished fifth in the constructors' standings.

Joint managing director Trevor Foster and head of engineering Tim Holloway leave immediately, while chief operating officer John Putt will depart after guiding the company to its new management structure.

Jordan will maintain a workforce of just over 200, in a revised structure to return Jordan to a "more flexible, open style of organization."

CEO Eddie Jordan will oversee competitive and commercial issues in the shakeup, with technical matters run by Henri Durand, director of design and development, and Gary Anderson, director of race and test engineering.

"Jordan has always been at its best when lean and efficient," Jordan said Tuesday. "Once you sense complacency creeping in, or costs become exorbitant, a prudent business needs to take action.

"These changes will generate a more efficient structure at a time when our focus is on the performance and reliability of our cars."

Jordan will personally oversee racing and commercial issues while the technical side will be run by Henri Durand, the director of design and development, and race director Gary Anderson.

There was no mention of technical director Eghbal Hamidy, who has been officially "on vacation" from the team since the start of the season.

"It's been a difficult start to the season for us but we are now regrouping for an even more vigorous assault on the remaining 13 grands prix," Jordan said.

Reuters contributed to this report.