analytical: A cross-nested design for an analytical method investigation

In hassediagrams: Hasse Diagram of the Layout Structure and Restricted Layout Structure

A cross-nested design for an analytical method investigation

Description

The reliability of an analytical method was assessed in an experiment consisting of three batches of material, analysed by four analysts, two at each site. Within each site, there were two chromatographic systems and two columns. For each batch/analyst/system/column combination, two preparations (dissolved samples) were made. From each preparation, two injections were performed.

Usage

data(analytical)

Format

A data frame of 192 observations on 8 factors:

Site

Categoric factor with levels 1 and 2.

Analyst

Categoric factor with levels 1-4.

Run

Categoric factor with levels 1-16.

Prep

Categoric factor with levels 1-96.

Injection

Categoric factor with levels 1-192.

System

Categoric factor with levels 1-4.

Column

Categoric factor with levels 1-4.

Batch

Categoric factor with levels 1-3.

Source

Bate, S.T. and Chatfield, M.J. (2016). "Identifying the Structure of the Experimental Design". *Journal of Quality Technology* 48, pp. 343-364.

Examples

data("analytical")
analytical

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