What kind of timing problems may occur like signal delay when testing out the sequential system and solutions can be done to fix it?

relating to these pictures:

State Table STATE PRESENT STATE INPUT NEXT STATE OUTPUT Q1 QOX Q2+ Q1+ Q0+ ZD 00 0 0 0 0 1 0 0 1 1 1 0 1 0 1 1 1 1 1 1 1 0 0 We implement design using 3 No's of D Flip Flops, Hence use K-Map to derive D inputs We implement design using 3 No's of D Flip Flops, Hence use K-Map to derive D inputs 80100 01 ID 20% OLI 10 10 TTT Dz=QqQq+Q, X+Q2Q, Qo D1 = Q2Q, x+ Q2Q, X+Q, QoX x Qot QA00 OD 10 Q299 00 OD 1L 10 all 10 11 10 Do=X+QQ,+ QLQ , Qo ZI=QQ1 +Q Po We implement a Moore FSM base sequence detector to identify arrival of "010" or "110". The output ZD is set to logic 1 at first occurence of above "010" or "110" input and reset to lofic 0 and second occurence. Hence ZD keeps toggling with "010" or "110" arrival. ZD is logically XORed with input X to give output Z. When ZD = 1 then Z=X' When ZD = 0 then Z = X State graph is shown below We use binary state enoding SY Let so = Q2Q, Q = 000 SI = 001 S2 = 010 S3 = 011 S4 = 100 S5=101 S6=1 to S7 = III State Table STATE PRESENT STATE INPUT NEXT STATE OUTPUT Q1 QOX Q2+ Q1+ Q0+ ZD 00 0 0 0 0 1 0 0 1 1 1 0 1 0 1 1 1 1 1 1 1 0 0 We implement design using 3 No's of D Flip Flops, Hence use K-Map to derive D inputs We implement design using 3 No's of D Flip Flops, Hence use K-Map to derive D inputs 80100 01 ID 20% OLI 10 10 TTT Dz=QqQq+Q, X+Q2Q, Qo D1 = Q2Q, x+ Q2Q, X+Q, QoX x Qot QA00 OD 10 Q299 00 OD 1L 10 all 10 11 10 Do=X+QQ,+ QLQ , Qo ZI=QQ1 +Q Po We implement a Moore FSM base sequence detector to identify arrival of "010" or "110". The output ZD is set to logic 1 at first occurence of above "010" or "110" input and reset to lofic 0 and second occurence. Hence ZD keeps toggling with "010" or "110" arrival. ZD is logically XORed with input X to give output Z. When ZD = 1 then Z=X' When ZD = 0 then Z = X State graph is shown below We use binary state enoding SY Let so = Q2Q, Q = 000 SI = 001 S2 = 010 S3 = 011 S4 = 100 S5=101 S6=1 to S7 =