Umthengisi wezindawo yomphakathi nguwo umthengisi wokunikeza umphakathi osebenzisa ukunikeza umphakathi wokuphakamisa isimo somsebenzi, okwaziwa futhi njengomthengisi wezindawo noma umthengisi wezindawo wokunikeza. Uyakwazi ukuphakamisa noma ukuguqula izimo zomsebenzi wokuphakamisa isimo somsebenzi, kanye nezimo zomsebenzi zomthengisi, kusukela kubonakala noma kubonakala-chemico.