Under what condition is the pivot method typically used?

The pivot method is typically used for aligning the machine to excavation because it allows the operator to effectively position the machinery in a manner that ensures precise alignment with the desired excavation area. This technique involves the machine's rotation about its pivot point, enabling the operator to make necessary adjustments without the need to reposition the entire unit. This is particularly useful when working on tight sites or in areas where space is limited and accuracy is crucial.

In contrast, options like connecting two trenches, crossing trenches, or digging deeper holes involve different operational strategies. These tasks may require other techniques or equipment to address nuances stemming from trench geometry, depth, or horizontal alignment. The pivot method specifically emphasizes alignment efficiency and precision in excavation practices.