While not practical for operations which very low processing times and correspondingly high change-over times (both values defined by takt time), it is nevertheless a Lean Manufacturing goal to achieve single piece flow in every operation possible. Achieving one-piece flow requires the elimination of waste.
Throughout human history, most people live and die in the social class into which they were born. If they were born poor, chances are they will die poor. One way societies can help people rise in social class is to initiate new enterprises, like improved educational opportunities or technological advancements.
more than one billion peoplein the world live on less than one dollar a day another 2 7 billion struggle to survive on less than two dollars per day poverty in the developing world however goes far beyond income poverty it means having to walk more than one mile everyday simply to collect water and fire wood it means suffering diseases that were eradicated from rich countries decades ago