! Parts list;
   U, ! Unicycles;
   B, ! Bicycles;
   T, ! Tandems;
   S, ! Seats;
   W, ! Wheels;
   C, ! Chains;
   H, ! Hubs;
   P, ! sPokes;
   L~ ! Links;

!  The set of periods;
   1..9 ~

! The parent-child use relationships; 
! (i.e., Unicycles  use Seats, etc.);
U S, U W, B S, B W, B C, T S, T W, 
T C, W H, W P, C L ~

! The number of child parts required; 
! in each parent- child relationship,; 
!  respectively (i.e, Unicycles use 1; 
!  Seat, Wheels use 36 sPokes, etc.);
1, 1, 1, 2, 1, 2, 2, 2, 1, 36, 84~ 

! The lead times for each part;
   1, 2, 1, 1, 3, 1, 1, 2, 2~

! The external demands or master schedule;
! Time period;
!         1  2  3  4  5  6  7  8  9;
   ! U;   0, 0, 0, 0, 0, 0, 0,10, 0,
   ! B;   0, 0, 0, 0, 0, 0, 0, 0,20,
   ! T;   0, 0, 0, 0, 0, 0, 0, 0,20,
   ! S;   0, 0, 0, 0, 0, 0, 0, 0, 0,
   ! W;   0, 0, 0, 0, 0, 0, 0, 0, 0,
   ! C;   0, 0, 0, 0, 0, 0, 0, 0, 0,
   ! H;   0, 0, 0, 0, 0, 0, 0, 0, 0,
   ! P;   0, 0, 0, 0, 0, 0, 0, 0, 0,
   ! L;   0, 0, 0, 0, 0, 0, 0, 0, 0
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