A group of my students from Facilities Management class decided to help Tim Horton to improve its express store arrangement. They surveyed Tim’s customers and collected the following information:

1. 37% of all customers prefer the sequence of ABCDEFG

2. 38% of all customers prefer the sequence of CBADEFG

3. 12% of all customers prefer the sequence of BADEFG

4. 8% of all customers prefer the sequence of ACDEFG

5. 5% of all customers prefer the sequence of AFG

Where:

                        A: is pouring coffee

                        B: is dispensing milk or cream

                        C: is adding sugar

                        D: is stirring

                        E: is throwing stirrer in garbage can

                        F: is putting a lid

                        G: is paying to cashier

Currently Tim Horton express in C wing has an arrangement of CBFDAGE which is Sugar, Cream, Lid, Stirrer, Coffee, Pay, Garbage. Use below methods: modify Tim’s arrangement to minimize backtrack.

1. From-To-Chart Method

2. String Diagram