WASHINGTON — The Federal Reserve has left little doubt about its plans for the next few months, and thus little mystery about the statement it will release Wednesday after the latest meeting of its policy-making committee. The economy remains weak. The Fed will keep buying bonds to hold down borrowing costs.

Inside the central bank, however, debate is once again shifting from whether the Fed should do more to stimulate the economy to when it should start doing less.

Proponents of strong action to reduce unemployment won a series of victories last year, culminating in December when the Fed announced that it would hold short-term interest rates near zero at least until the unemployment rate fell below 6.5 percent. The rate was 7.8 percent in December.

To accelerate that process, the Fed also said it would increase its holdings of Treasury securities and mortgage-backed securities by $85 billion each month until it sees clear signs of strength in the job market.