New Car Assessment Japan
Safety Information Group
6-1-25 Koji-machi, Chiyoda-ku,
Tokyo 102-0083
Phone: 03-5276-4455
[Weekdays 9:15 a.m.~5:30 p.m.]
E-Mail : admin@nasva.go.jp
Outline of usability evaluation test
evaluation method
Products were scored in survey areas, and the average of the scores in each survey area is reported in the survey results.

| Test area | Object tested | Standard performance level |
|---|---|---|
| Instruction manual etc. | Explains installation of CSR to the vehiole seat and placing of child inCSR. Contains descriptions mandated by tthe echnical standards. | |
| Installation method of CSR and placing of child in the CSR can be understood by the diagrams and written instructions. | ||
| Contains warning against installation in front passenger's seat. Contains descriptions mandated by technical standards | ||
| Explains variations in installation of seat and placing of child in seat depending on size of the child. | ||
| Explains how to confirm that the child seat is properly installed. | ||
| Package written markings | Weight or height of children for which the CSR is appropriate is indicated on the package (in Japanese). | |
| Written markings on the product | Indicates method of installation | |
| Contains warning against installation in front passenger's seat. Contains warnings and prohibitions mandated by technical standard. Descriptions mandated by technical standards and standards which the CSR meets are shown. | ||
| Markings are appropriate, not likely to lead to misunderstandings. | ||
| Describes where to get further information on the product. | ||
| Standard met by the product ais indicated (marks acceptable). | ||
| Verbal instructions printed. | ||
| Product mechanisms | (ease and reliability of reclining, rotating) |
Locks with certainty. Position of lever switch is easy to understand. |
| Connector and top tether may be simply operated. | ||
(ease of maintenance) |
After the seat cover is removed or attached, it is difficult to make a mistake installing the harness. Can be installed with certainty. | |
| Built-in storage section (for manual, accessories) |
There is a place for storage of manual and accessories (if any). | |
| Easy,mistake-proof installation (to the car seat) |
Belt routing | It is difficult to make a mistake in routing. Belt easily passes through passages. Twisting or folding of vehicle seatbelt does not occur. |
| Possible to fix easily and certainly by a person (may be loaded) | ||
| Fixing metal parts may use easily as sufficient fixing | ||
| For forward facing:no wobbling after fixing (when pulled up to up ward direction with 10kgt,movement shall be stayed between 3 to 5cm) | ||
| For rearward facing:seat back angle shall be stayed with in 45±10 degrees. (may insert something between vehicle seat and CRS) | ||
| May be confirmed fixing certainly by sound or indication, etc. | ||
|
Placing ability
|
Slots easy to find. | |
| Proper adjustment can be done easily and with certainty. | ||
| Locking can be done easily and with certainty. | ||
| Force required to release buckle is sufficient to make it difficult for child to release (40N or more). | ||
| A specialist can seat the dummy in the proper position within 1 min. |
Evaluation item is added for universal type ISOFIX child seat

