A work support apparatus holds a value indicating information on at least one of an apparatus used for a work and a worker, a work change recognition determination algorithm, and a work support content corresponding to a determination result, applies a value indicating information on at least one of the apparatus and the worker to the work change recognition determination algorithm, determines whether or not the worker recognizes a work change indicating at least one of a change in a work process and a transition between a normal state and an abnormal state of a work, and outputs, to the output device, a work support content corresponding to the determination result.

A numerical controller comprises a restart position candidate setting unit configured to store information on a block serving as a restart position candidate where machining is to be restarted, on the basis of a result of an analysis of a machining program, a block head position drawing unit configured to draw, when the machining is interrupted, a machining position corresponding to a head of the block serving as a restart position candidate stored by the restart position candidate setting unit, on the machining path displayed on a machining path graphic screen, and a restart block setting unit configured to set a block corresponding to a machining position designated by a user from among the machining positions drawn by the block head position drawing unit, as a restart block.

A task resumption system including processing circuitry that receives a task resumption specification for task resumption by a device when the device, which sequentially performs multiple tasks, stops during processing, acquires a current state of the device, acquires a resume state corresponding to the task resumption of the device, causes the device to transition from the current state to the resume state, and causes the device to resume the task according to the resume state.

A task resumption system including processing circuitry that receives a task resumption specification for task resumption by a device when the device, which sequentially performs multiple tasks, stops during processing, acquires a current state of the device, acquires a resume state corresponding to the task resumption of the device, causes the device to transition from the current state to the resume state, and causes the device to resume the task according to the resume state.

A numerical controller comprises a restart position candidate setting unit configured to store information on a block serving as a restart position candidate where machining is to be restarted, on the basis of a result of an analysis of a machining program, a block head position drawing unit configured to draw, when the machining is interrupted, a machining position corresponding to a head of the block serving as a restart position candidate stored by the restart position candidate setting unit, on the machining path displayed on a machining path graphic screen, and a restart block setting unit configured to set a block corresponding to a machining position designated by a user from among the machining positions drawn by the block head position drawing unit, as a restart block.