Process Performance Determination in C# Part 4

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ExcelNORMSDIST;

namespace ProcessPerformance4
{
    /// <summary>
    /// Process Performance from Z-Transformation Result class
    /// </summary>
    public class ProcessPerformanceFrZResult
    {
        /// <summary>
        /// Default constructor
        /// </summary>
        public ProcessPerformanceFrZResult() { }
        /// <summary>
        /// Expected % > USL
        /// </summary>
        public double PercentMoreThanUSL;
        /// <summary>
        /// Expected % < LSL
        /// </summary>
        public double PercentLessThanLSL;
        /// <summary>
        /// Expected yield (overall) %
        /// </summary>
        public double PercentYieldOverall;
    }

    /// <summary>
    /// Determine Process Performance from Z
    /// </summary>
    public class ProcessPerformanceFrZ
    {
        private double xBar = 0;
        private double s = 0;
        private double LSL = 0;
        private double USL = 0;
        private double percentMoreThanUSL = 0;
        private double percentLessThanLSL = 0;
        private double percentYieldOverall = 0;

        /// <summary>
        /// ProcessPerformanceFrZ Result
        /// </summary>
        public ProcessPerformanceFrZResult Result = new ProcessPerformanceFrZResult();

        #region constructor
        /// <summary>
        /// ProcessPerformanceFrZ default constructor
        /// </summary>
        public ProcessPerformanceFrZ() { }//default empty constructor
        #endregion//constructor

        /// <summary>
        /// Write only property: Mean
        /// </summary>
        public double XBar
        {
            set { xBar = value; }
        }

        /// <summary>
        /// Write only property: Std Dev
        /// </summary>
        public double StdDev
        {
            set { s = value; }
        }

        /// <summary>
        /// Write only property: Lower Spec Limit
        /// </summary>
        public double LowerSpecLimit
        {
            set { LSL = value; }
        }

        /// <summary>
        /// Write only property: Upper Spec Limit
        /// </summary>
        public double UpperSpecLimit
        {
            set { USL = value; }
        }

        /// <summary>
        /// Calculate the Process Performance from Z
        /// </summary>
        public void Analyze() 
        {
            percentMoreThanUSL = 100 * (1 - Excel.NORMSDIST((USL-xBar)/s));
            percentLessThanLSL = 100 * (Excel.NORMSDIST((LSL-xBar)/s));
            percentYieldOverall = 100 - percentMoreThanUSL - percentLessThanLSL;
            //Results
            Result.PercentMoreThanUSL = percentMoreThanUSL;
            Result.PercentLessThanLSL = percentLessThanLSL;
            Result.PercentYieldOverall = percentYieldOverall;
        }
    }//end class ProcessPerformanceFrZ
}