Television producer Caryn Mandabach announced today that she will leave Carsey-Werner-Mandabach after 20 years as producer and partner to form an independent television production company.

“I’m formulating a company that I hope will have staying power,” she told TelevisionWeek. Ms. Mandabach also said she has not decided whether she will form an independent studio modeled after CWM or make a deal with a network or a larger studio. She said her relationships with Marcy Carsey and Tom Werner remain strong, and that she remains a profit participant in the company’s existing shows. Her decision comes just weeks after the partners announced they were not selling their studio and were instead remaining independent.

“There are no creative differences,” Ms. Mandabach said. “We are mad for each other. We’re neighbors and friends. It’s all about me and what I feel I need to do now.”

While at Carsey-Werner-Mandabach Ms. Mandabach helped develop and produce “The Cosby Show,” “Roseanne,” “That ’70s Show,” “3rd Rock From the Sun” and “Grace Under Fire.”

Ms. Mandabach said her move does not affect her partnership with Ms. Carsey and Mr. Werner in the Oxygen cable network. She will also remain a producer with CWM films and have a first-look deal with the company.