Defects per Million This quality measure discerns between good and bad product You must of course identify the specification of the product accurately To compare two different companies' DPM rate, you need to make sure that they use the same level of compliance to specifications You can discern between critical DPM's (i e the item was not included in the package) and non-critical DPM's (i e a smudge on the packing slip)
disintegrations per minute: the number of atoms of a radioactive substance decaying (emitting ionizing radiation and changing to another substance) per minute
Abbreviation for Distributed Positron Model In this model, for the purpose of mimicking nonadiabatic and short-range correlation effects, the positron is treated as a non-point distribution of charge within the quantum chemistry code that calculates the polarization potential The DPM affects only the polarization potential and is not used to describe the positron in the quantum scattering calculations