A method for automatically checking the availability of a technical apparatus in or on a building, wherein the technical apparatus carries out at least one repeatable process, which method comprises: carrying out at least one test of the technical apparatus in which test at least one reaction (R) of the technical apparatus is registered and compared with a target reaction (R S ), wherein upon availability of the technical apparatus , the reaction (R) corresponds with the target reaction (R S ), characterized in that a measured value (N m (i,t)) for the frequency of the execution of the process is determined for a first time period (ΔT(i)) by a processor (P1) and stored in a first memory (M13), wherein the frequency of the execution of the process indicates how often the process can be registered in the first time period (ΔT(i)) and the test is carried out only if the measured value (N m (i,t)) is lower by a predetermined value (N S (i,t) - N min (i,t), ΔN S ) than a predetermined value which is set either equal to a first estimated value (N S (i,t)) for the frequency of the execution of the process for the first time period (ΔT(i)) or equal to a second estimated value (N S (i,t + Δt)) for the frequency of the executions of the process for a second time period (ΔT(i + 1), wherein the first estimated value (N S (i,t)) and the second estimated value (N S (i,t + Δt)) are loaded into the processor (P1) from a second memory (M12), wherein the first and second estimated values (N S (i,t), N S (i,t + Δt)) for the respective time period (ΔT(i), ΔT(i + 1)) are determined by the processor (P1) in each case by registering, prior to this time period (ΔT(i), ΔT(i + 1)), the respective executions of the process and times at which the respective execution of the process begins, and by determining, by means of predetermined assumptions with respect to a future development of the frequency of the execution of the process, from the times already registered, which frequency of the execution of the process can be expected for the time period (ΔT(i), ΔT(i + 1)). carrying out at least one test of the technical apparatus in which test at least one reaction (R) of the technical apparatus is registered and compared with a target reaction (R S ), wherein upon availability of the technical apparatus , the reaction (R) corresponds with the target reaction (R S ), characterized in that a measured value (N m (i,t)) for the frequency of the execution of the process is determined for a first time period (ΔT(i)) by a processor (P1) and stored in a first memory (M13), wherein the frequency of the execution of the process indicates how often the process can be registered in the first time period (ΔT(i)) and the test is carried out only if the measured value (N m (i,t)) is lower by a predetermined value (N S (i,t) - N min (i,t), ΔN S ) than a predetermined value which is set either equal to a first estimated value (N S (i,t)) for the frequency of the execution of the process for the first time period (ΔT(i)) or equal to a second estimated value (N S (i,t + Δt)) for the frequency of the executions of the process for a second time period (ΔT(i + 1), wherein the first estimated value (N S (i,t)) and the second estimated value (N S (i,t + Δt)) are loaded into the processor (P1) from a second memory (M12), wherein the first and second estimated values (N S (i,t), N S (i,t + Δt)) for the respective time period (ΔT(i), ΔT(i + 1)) are determined by the processor (P1) in each case by registering, prior to this time period (ΔT(i), ΔT(i + 1)), the respective executions of the process and times at which the respective execution of the process begins, and by determining, by means of predetermined assumptions with respect to a future development of the frequency of the execution of the process, from the times already registered, which frequency of the execution of the process can be expected for the time period (ΔT(i), ΔT(i + 1)). <EOS>