The analysis of the index of defects Mazurkiewicz, Jacek; Bregula, Joanna
Steel times international,
05/2004, Volume:
28, Issue:
4
Journal Article
The ratio of the number of defects and the production size in which they were detected is known as the 'pd' level of defects. This index is dimensionless or expressed as a percentage (pd %). It ...refers to gross production and ranges from 0-1. The index is related only to a given portion of production and not to the time period over which production takes place. However this fact is important but is usually neglected when analysing defect levels which may be recorded on a daily, weekly, monthly or annual basis. This paper strives to show that specific periods of production in which the defects are detected should be considered. In calculating the ratio of defects to production size, the time factor is not taken into account but the index changes show that the length of time over which measurements are taken is essential.
Bone tumours comprise about 5% of childhood neoplasms. Osteosarcoma is the most common sub-type and constitutes 60 % of all bone cancers. Incidence is similar in girls and boys and is increasing ...steeply with age. The most common localization of this tumour is long bones of the legs. Treatment including chemotherapy and surgery has led to an increase of the percentage of non-mutilating recovery. We present treatment results of 14 children with osteosarcoma.
