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pi  Mathematical constant  4*atan(1)  3.14159e+00  
Dw  Diameter of the wafer  0.150  m  1.50000e01 
Aw  Usable area of the wafer  pi*(Dw0.02)^2/4  m2  1.32732e02 
lw  Line width  1.0e6  m  1.00000e06 
D  Defect density  1.35e6 to 1.65e6  1/m2  1.35000e+06 to 1.65000e+06 
Ap  Area of a processor cell  9900*lw^2 to 10100*lw^2  m2  9.90000e09 to 1.01000e08 
Yp  Processor yield  exp((D*Ap)^0.5) to exp(D*Ap)  8.78892e01 to 9.86724e01  
Npw  Number of processors on the wafer  Aw/Ap  1.31418e+06 to 1.34073e+06  
Ngpw  Number of working processors per wafer  Yp*Npw  1.15502e+06 to 1.32293e+06  
IPSp  Instructions per second for each processor  1.5/lw  1/s  1.50000e+06 
IPSw  Raw instructions per second for the wafer  Ngpw*IPSp  1/s  1.73253e+12 to 1.98440e+12 
Pp  Power consumption per processor  1.35e6*lw^2 to 1.65e6*lw^2  W  1.35000e06 to 1.65000e06 
Pw  Power consumption for the wafer  Ngpw*Pp  W  1.55928e+00 to 2.18283e+00 
Over all, ABOTEC is probably no longer necessary, since its role can be largely performed by conventional spreadsheet programs. ABOTEC does offer two major advantages, though. One is the ability to refer to parameters by their userdefined symbol name, rather than the obscure "C15" type of naming that is used in conventional spreadsheet programs. The other is the use of the "to" operator to handle engineering tolerances, and error bounds (and could also be used to indicate the range been two different theoretical models, such as for the processor yield calculation, Yp, in the above example, using the Seeds and Poisson models). For this, each arithmetic operation takes a pair of values (the minimum and maximum) for each input parameter, and generates a pair of values for its result. The program correctly takes account of the appropriate boundary conditions (when evaluating in the arithmetic and trigonometric expressions, for example, such as between sin(0.9*pi/2) to sin(1.1*pi/2) for example, or even tan(0.9*pi/2) to tan(3.1*pi/2)).