Solution : https://service.sap.com/sap/support/notes/397751 (SAP Service marketplace login required)
Key words : 
project planning board reason, project planning board, followup errors occur, full table scan, table caufv, maintenance order, service order, network activities, system performs, time_out occurs
Related Notes : 
       
| 536870 | CJ2B: Display/highlight PM/SM order | 
| 502044 | CJ2B: Display/highlighting PM/SM order: TIME_OUT | 
| 414213 | ORACLE:Performance problms with CAUFV select (CN24 + others) |