Industry Ministry to revise MPI amid gains Cautious optimism as export trend shaky published : 29 Jun 2021 at 05:47 Workers at an automotive plant in Chon Buri province. Somchai Poomlard The Industry Ministry may revise up its 2021 manufacturing production index (MPI) in July after it increased by 25.8% in May and reached 100.47 points year-on-year, the highest increase in five years since 2016, says the Office of Industrial Economics (OIE). Despite the need to keep a close watch on the third wave of Covid-19, which is affecting many factories, Industry Minister Suriya Jungrungreangkit remains optimistic, saying factories have only shut down some production temporarily and this will not have a serious impact on the sector.