Process Performance Determination in C#: Part 2

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

namespace ProcessPerformance2
{
    /// <summary>
    /// Process Performance from PPM (Part per Million) Result class
    /// </summary>
    public class ProcessPerformanceFrPPMResult
    {
        /// <summary>
        /// Default constructor
        /// </summary>
        public ProcessPerformanceFrPPMResult() { }
        /// <summary>
        /// Defect Per Unit
        /// </summary>
        public double DPU;
        /// <summary>
        /// Part Per Million
        /// </summary>
        public double PPM;        
        /// <summary>
        /// Yield in Percent
        /// </summary>
        public double YieldInPercent;
    }

    /// <summary>
    /// Determine Process Performance from PPM
    /// </summary>
    public class ProcessPerformanceFrPPM
    {
        private int N = 0;
        private int D = 0;
        private double dpu = 0;
        private double ppm = 0;
        private double yieldInPercent = 0;
        
        /// <summary>
        /// ProcessPerformanceFrPPM Result
        /// </summary>
        public ProcessPerformanceFrPPMResult Result = new ProcessPerformanceFrPPMResult();

        #region Constructors
        /// <summary>
        /// Process performace from PPM constructor
        /// </summary>
        public ProcessPerformanceFrPPM() { } //default empty constructor

        #endregion //Constructors

        /// <summary>
        /// Write only property: total number of units
        /// </summary>
        public int NumOfUnitProcessed
        {
            set { N = value; }
        }

        /// <summary>
        /// Write only property: total number of defective parts
        /// </summary>
        public int NumOfDefectivePart
        {
            set { D = value; }
        }

        /// <summary>
        /// Calculate the Process Performance from PPM
        /// </summary>
        public void Analyze()
        {
            dpu = (double)D / N;
            ppm = (double)D / N * 1000000;
            yieldInPercent = (1 - ppm / 1000000) * 100;
            //Result
            Result.DPU = dpu;
            Result.PPM = ppm;
            Result.YieldInPercent = yieldInPercent;            
        }

    }//end class ProcessPerformanceFrPPM
}