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+//To Design the system to meet the given Equivalent System Reliability

+//Page 614

+clc;

+clear;

+

+//Individual System Reliabilities

+Ra=0.8;

+Rb=0.95;

+Rc=0.99;

+Rd=0.90;

+Re=0.65;

+

+//When All Are Connected in Series

+

+Req=Ra*Rb*Rc*Rd*Re; //Equivalent System Reliability

+

+Rr=0.8; //Required

+

+Rae=Rr/(Rb*Rc*Rd);

+

+//Since Connecting the elements in parallel will increase their reliability

+deff('x=rel(Ri,y,)','x=(1-((1-Ri)^y))') //Equal Only Parallel Combination

+

+//Since Connecting the elements in parallel will increase their reliability

+//Conditions to Find The Number of Elements to be used

+for i= 1:10

+    L=i; //Number of Time Element A is used

+    R1=rel(Ra,i);

+    X=R1-Rae;

+    if(abs(X)+X==0)

+        continue;

+    else

+        break;

+    end

+end

+

+for i= 1:10

+    M=i;//Number of Time Element E is used

+    R2=rel(Re,i);

+    X=R2-Rae;

+    if(abs(X)+X==0)

+        continue;

+    else

+        break;

+    end

+end

+

+printf('a) The Equivalent system Reliability is %g\n',Req)

+printf('b) One Each of B,C and D all connected in series are connected in series\nwith the series combination of X(Comination of %g elements of A, All Connected in Parallel)\nand Y(Comination of %g elements of E, All Connected in Parallel) to achieve \n%g Equivalent System Realibility\n',L,M,Rr)