| anlys | Analysis of data | 
| nbbd1 | NBB Design of Type 1 (NBBD 1) | 
| nbbd2 | NBB Design of Type 2 (NBBD 2) | 
| nbbd3 | NBB Design of Type 3 (NBBD 3) | 
| pnbbd1 | PNBB Design of Type 1 (PNBBD 1) | 
| pnbbd2 | PNBB Design of Type 2 (PNBBD 2) | 
| sample_data | sample data for analysis of NBB/PNBB design |