| 摘要 |
The method for automatic checking of the availability of a lift installation (1) with at least one lift (1.1, 1.2), comprises the following steps (S1 - S11). There is ascertained: at least one first estimated value (N S(it)) for a use frequency of the lift (1.1, 1. 2) for a first time period and/or a second estimated value (N S(i,t+.DELTA.t)) for the use frequency for a second time period, wherein the second time period begins at a later point in time than the first time period. A measurement value (Nm(i,t)) for the use frequency for the first ti me period is determined and the measurement value compared with at least one of the estimated values (N S(i,t), N S(i,t+.DELTA.t)). If the measurement value (Nm(i,t)) is smaller than the respective estimated value (N S(i,t), (N S(i,t+.DELTA.t)) by a predetermined amount (N S(i,t) - Nmin(i,t), .DELTA.N S), at least one predetermined command for carrying out at least one test of the li ft installation (1) is given, wherein the test in the case of availability of the lift installation (1) leads to a desired reaction (R S) of the lift installation. Subsequently, at least one reaction (R) of the lift installation (1) is registered and compared with the desired reaction ( R S).
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