ASSIGNMENT 1

SUBJECT: SYSTEMS DYNAMICS

CODE: SDN411T

DATE: 25TH FEBRUARY 2015

Department: Industrial Engineering

Lecturer: mr o.a. makinde, Room 2-337
Please note that this Assignment will only be uploaded on MyTutor SDN411T until the 7th April (Day and Evening Class) at 000hrs and not at any later times! MARKING

This assignment carries a weighting of 25% of the marks for this subject. Sections will be weighted individually as follows:

TASKS | | TOTAL MARKS | 1 | | 60 | 2 | | 110 | Overall Presentation | Summary, Introduction, Report Flow, References, etc. | 10 | TOTAL MARKS | 180 | Objective:
To write a report that covers the items listed below. The report should include sketches and diagrams wherever these are relevant. A maximum of 15 sides of A4 script would be satisfactory with font size 12 Times Roman and 1.5 line spacing.
1. APPLICATIONS OF SIMULATION 1.1 Investigate two different manufacturing and servicing industries in South Africa and other countries in the global world where simulation has been applied. Note: Each of these industries should be from two different manufacturing and servicing industries. Your investigation should clearly indicate the following (though not exclusively so); 1.2.1 When simulation was adopted in each of these industries [4] 1.2.2 How has simulation been carried out in each of the industries identified? (The methodology) [16] 1.2.3 Which simulation packages were used in those industries in order to mimic and/or optimize the performance of operations carried out in each of the industries identified? [8] 1.2.4 The issues considered for the system(s) simulated in each of the manufacturing and servicing industries? [12] 1.2.5 How can the investigated simulations in the identified manufacturing and servicing industries scenarios be adopted and utilized in learning environments for fresh beginners and learners of simulation and System Dynamics? [10] 1.2 Briefly explain how you would apply one of the scenarios reviewed in 1.1 to ensure dynamic system simulation of an identified industry in South Africa where simulation has not been implemented. [10]

2. EVENT DRIVEN HAND SIMULATION (CONDITION: OBSERVE FOR AT LEAST 1 HOUR OR 15 COMPLETED SERVICES WHICH EVER APPLIES FIRST)
2.1 Choose any relevant and accessible manufacturing and servicing industry in South Africa where you will execute a hand simulation.
2.1.1 For four different days at a consistent time interval for an hour; in a specified functional section or department of the identified manufacturing or servicing industry of your choice, compile a table with the following; [15]
Table 1. Arrival, Interarrival, and service times of parts (in min) Part / Item Number | Arrival Time | Interarival Time | Service Time | | | | | | | | | | | | | 2.1.2 Using the average data table obtained from the real life data obtained in 2.1.1, compile a record of the hand simulation and record your data in a table with the columns as indicated below. [60] 2.1.3 Draw the all time persistent Curves, obtained from the result of the hand Simulation [10]
Table 2 Hand Simulation Record Just finished Event | Variables | Attributes | Statistical Accumulators | Event Calendar | | | Arrival Times | | | | | Entity No. | Time t | Event Type | Q(t) | B (t) | In Queue | In Service | P | N | ∑WQ* | WQ* | ∑TS | TS* | ∫Q | Q* | ∫B | [Entity No. | Time | Type] |

P = the total number of parts produced so far
N = the number of entities that have passed through the queue so far.
∑WQ* = the sum of the queue times that have been viewed so far
WQ* = the maximum time in queue observed so far
∑TS = the sum of the total times in the system that have been observed so far
TS* = the maximum total time in system observed so far
∫Q = the area under the Q(t) curve so far
Q* = the maximum value of Q(t) so far
∫B = the area under the B(t) curve so far

2.1.4 Discuss the hand simulation result of the identified manufacturing or servicing industry in South Africa and its implication (effects or significance) to the business functionality and profitability of the identified industry. In view of identified implications (if any), as a system dynamist and business optimizer, enumerate suitable recommendations that could be used to optimize the business function of the identified industry. Finally, discuss in details how computerisation of hand simulation you did, will positively influence and enhance the task you have done for the identified industry. [25]