| Number of items |
| 500 items requested |
| Acquisition barrier |
|
|
| 40 items |
|
| not acquired |
|
| 460 items acquired |
| PA = .92 |
|
|
| 415 items not
in |
|
| circulation |
|
| Circulation barrier |
|
|
| 45 items in |
|
| circulation |
|
| PC = .90 |
| Library barrier |
|
|
| 348 items in
correct |
|
| location on shelves |
|
|
|
| 67 items not in
correct |
|
| location on shelves |
|
| PL = .84 |
| User barrier |
|
|
|
| 331 items
correctly |
||
| located on
shelves |
||
| by user |
||
|
|
| 17 items not
located |
|
| on shelves by user |
|
| PU = .95 |
| Adapted from Kantor (76) |
|
|
| PS =
PA × PC
× PL × PU |
|
| PS = .66 |
|