Answer: Using crude oil production as a case study:
Non systematic perspective:
An Engineer read a journal on "production of crude oil from it's reserves beneath the earth surface" this Engineer started conducting an experiment, to verify if crude oil is actually gotten beneath the earth surface.
Systematic perspective:
An Engineer went to Rig, where he saw an oil well, and saw how crude oil is been extracted from it reserves beneath the earth surface. The engineer postulate a theory, that crude oil is produced from it's reserves beneath the earth surface, and this is applicable for all crude oil production.
Try to understand the logic between the two story, so you can always use your own story to give examples. Hope this helped you.