title: Graphical tools for RFLP measurement quality assurance: laboratory performance charts.
abstract: Forensic restriction fragment length polymorphism analyses typically provide two band size results at each genetic locus for each sample. In collaboration with the member laboratories of the Technical Working Group for DNA Analysis Methods, we have developed graphical techniques that compactly summarize even large numbers of such paired measurements. This paper provides a detailed description of the basic tool, a modified bivariate control chart for data from multiple samples and/or multiple loci. We demonstrate how various modifications and combinations of these "laboratory performance charts" can be used for quality control, quality assurance, and quality demonstration.
authors.affiliation: Biotechnology Division, National Institute of Standards and Technology, Gaithersburg, MD, USA.
authors.forename: K T
authors.initials: KT
authors.lastname: Gary
authors.forename: D L
authors.initials: DL
authors.lastname: Duewer
authors.forename: D J
authors.initials: DJ
authors.lastname: Reeder
mesh_terms: D003196:Computer Graphics; D016172:DNA Fingerprinting / Q000379:methods*; D006801:Humans; D020014:K562 Cells; D007753:Laboratories / Q000592:standards*; D012150:Polymorphism, Restriction Fragment Length; D011786:Quality Control; D012107:Research Design