What is the difference between inline and in-situ measurement?

“Inline measurement is performed at a defined point in the production flow, typically after a process step or between process steps. In-situ measurement monitors the film at the active coating process. TDM provides coating-head wet-film thickness and reflectance monitoring with SE31/SE310, plus wide-band transmission/reflection optical-film monitoring with SE31-FM. Explore in-situ metrology solutions.”