Method for an estimation of a time-variable measured variable of a system, the measured variable being an internal temperature of a vessel of a food processor for at least partially automatic preparation of food or an internal temperature of an interior of an oven , wherein at least one item of measurement information (210.1) is determined by a measurement , which item of measurement information differs from the true value of the measured variable at least as a function of at least one system parameter , where for the estimation of the true value, the following steps are performed: a) Providing a plurality of system parameter suggestions, each of which is different from the other, and each of which comprises a suggestion for at least one of the system parameters , b) Checking of the system parameter suggestions, whereby a repeated execution of the measurement and a weighting on the basis of the measurement information (210.1) determined thereby takes place, so that an evaluation of the system parameter suggestions is provided, (c) Perform the estimation using at least one of the system parameter suggestions, taking into account the evaluation, wherein by repeatedly performing the check according to step b) a sequential adjustment of the evaluation is performed, characterized in that at each repetition step, the evaluation is adjusted taking into account previous evaluations and on the basis of the measurement information (210.1) determined at the repetition step, so that, on the basis of the weighting, the optimum system parameter suggestion is determined, in particular which has the highest relevance for the actual system parameter , in order to obtain an optimum estimation result for the true value of the measured variable. at least one item of measurement information (210.1) is determined by a measurement , which item of measurement information differs from the true value of the measured variable at least as a function of at least one system parameter , where for the estimation of the true value, the following steps are performed: a) Providing a plurality of system parameter suggestions, each of which is different from the other, and each of which comprises a suggestion for at least one of the system parameters , b) Checking of the system parameter suggestions, whereby a repeated execution of the measurement and a weighting on the basis of the measurement information (210.1) determined thereby takes place, so that an evaluation of the system parameter suggestions is provided, (c) Perform the estimation using at least one of the system parameter suggestions, taking into account the evaluation, a) Providing a plurality of system parameter suggestions, each of which is different from the other, and each of which comprises a suggestion for at least one of the system parameters , b) Checking of the system parameter suggestions, whereby a repeated execution of the measurement and a weighting on the basis of the measurement information (210.1) determined thereby takes place, so that an evaluation of the system parameter suggestions is provided, (c) Perform the estimation using at least one of the system parameter suggestions, taking into account the evaluation, wherein by repeatedly performing the check according to step b) a sequential adjustment of the evaluation is performed, characterized in that at each repetition step, the evaluation is adjusted taking into account previous evaluations and on the basis of the measurement information (210.1) determined at the repetition step, so that, on the basis of the weighting, the optimum system parameter suggestion is determined, in particular which has the highest relevance for the actual system parameter , in order to obtain an optimum estimation result for the true value of the measured variable. <EOS>