Granger Electronics Ltd$.$ manufactures a variety of high$-$quality electronic components. Data from the last three months are presented below:

$\backslash$table$[[,$April,May,June$],[$Direct materials partial productivity,$0\mathrm{.}75,0\mathrm{.}76,0\mathrm{.}77],[$Overtime hours worked,$60,65,62],[$Defect rate,$1\mathrm{.}00\%,0\mathrm{.}95\%,0\mathrm{.}92\%$