MANAGEMENT PIH-113 PURDUE UNIVERSITY. COOPERATIVE EXTENSION SERVICE. WEST LAFAYETTE, INDIANA Calculating Swine Schedules Authors: Don D. Jones, Purdue University L. Bynum Driggers, North Carolina State University David B. Gerber, The Ohio State University Kent A. Law, Abilene, Kansas Ron Plain, University of Missouri Reviewers: Tom and Robin Cocking, Colfax, Washington Gary and Mary Comstock, Bronaugh, Missouri Dale Purkhiser, Michigan State University Harley and Bonnie Scholl, Grandin, North Dakota Emmett Stevermer, Iowa State University Pork producers generally want an even flow of livestock through their facilities, high building occupancy without over- crowding, an all-in, all-out operation to improve sanitation and help break disease cycles. Scheduling less than maximum produc- tion typically results from herd health problems or seasonal labor shortages. Pressure for maximum production comes from the investment costs of facilities; i.e., expensive facilities must be used intensively to be economical. To maximize facility use while keeping control of farrowing schedules, most producers divide their sow herds into groups and schedule the breeding and farrowing times within biological limi- tations. A schedule helps meet their production, labor, facil- ity, and other management goals. This publication is intended to help producers calculate a swine schedule for their particular situation. Principles of Swine Production Understanding the basic principles of the sow's reproduction cycle and the growth rates of pigs is essential to developing a good schedule. Farrowing Interval: The sow's biological cycle (the number of days between two successive farrowings of an individual sow) is the major constraint in a swine schedule. A portion of her time is spent in breeding, a portion in gestation, and a portion in farrowing. The gestation period is the most fixed of these values about -- 16 1/2 weeks plus or minus a day or so. The rule of thumb for swine gestation periods is 3 months, 3 weeks and 3 days. For our purposes, we will use a range of 113-116 days. Breeding: The length of the breeding period (the time from weaning until mating) depends upon which estrous cycle the sows are bred. First heat breeding (breeding at the first estrus after weaning) is the most desirable. The first estrus normally begins about three days after weaning (with a typical range of 3-7 days). The second heat occurs about 3 weeks later (with a range of 22 to 30 days after weaning). Thus, sows bred on their second heat average about 26 days from weaning to breeding. The range in estrus occurrence becomes greater (by about 3 days) with the passage of each successive estrous cycle in which the sows are not bred and will be carried through the gestation period resulting in a wider range in birth times and weaning ages within a group. To reduce the weight and age ranges of weaned pigs, produc- ers must strive to minimize the time over which sows are bred and thereby the range over which pigs are farrowed. If sows are exposed to the boar from the first return to estrus (about 3 days after weaning) for 4 days (breeding time) and then removed, most reproductively efficient sows should have returned to estrus, bred, and settled. Sows that have not settled should be culled from the herd. This means faster turnover in the sow herd and might mean selling sows that farrowed a large, healthy litter last time. It requires discipline on the part of the manager. A lack of discipline, however, will result in degeneration of a scheduled system to continuous farrowing and the inability to maintain an all-in, all-out system. This is especially true of more intensive schedules. Production schedules with fewer than about 8 farrowings per year sometimes breed over a 10- to 14-day period. This gives a longer time to work bred gilts into the sow groups and decreases the management level needed at breeding time. Conception rates are affected by seasonal factors, but these factors aren't well understood. Rates depend to some extent on the geographical location of the farm (climate), on the type of facilities in use, and on management factors. For example, animals in an artificially heated and cooled environment will not be affected to the extent of animals housed in outside lots and uninsulated shelters. However, seasonal conception rate differ- ences occur in swine regardless of temperature effects. They can even be different from herd to herd in similar locations. If conception rates are significantly lower during certain times of the year, additional sows must be bred to ensure that farrowing crates are kept full later in the year. For example, if herd records show that a 60% conception rate typically occurs during July breedings, 34 females (20 : 0.6) must be bred in order to fill a 20-sow farrowing house 113 days later. Since it is uneconomical to carry a sow to the second heat period if she does not conceive, gilt replacement numbers must be determined in advance and added to the herd at the desired breeding time. See PIH-89, Managing the Gilt Pool for more information. Weaning age: The typical weaning age used in the U.S. is about 5 weeks, with a range of 2 to 8 weeks. This is the one variable that the producer can control (within practical limits) and that directly affects the rest of the schedule. For example, the calculated breeding period can be lengthened by lowering the minimum desired weaning age while leaving the maximum desired weaning age constant. Certainly, it is not surprising that a longer breeding period would result in a wider range of weaning ages (see the attached worksheet). Likewise, the interval between successive farrowings (IBF) is lengthened by increasing the maximum weaning age or shortened by decreasing the maximum weaning age. Animal Growth Rates: Typical weight and age ranges for nur- sery and growing-finishing animals are shown in Table 1. Table 1. Typical swine growth ranges. _____________________________________ Production Age range Weight stage (weeks) (lb) _____________________________________ Farrowing 0-8 3-40 Nursery 3-12 10-100 Growing 9-18 60-150 Finishing 18-30 150-230 ===================================== Ages of market hogs range from 22 to 30 weeks with an aver- age of about 28 weeks in inside facilities and a week or two less if hogs are finished during summer months in outside lots. The Group Concept The actual time that swine are in each production stage depends more on IBF than on any other single factor since most producers move animals in groups after they leave the farrowing area. Furthermore, they typically move all groups at about the same time, except for perhaps a short period when a room might be empty for cleaning or for equipment repair. For example, a group might be sold from finishing, a new group moved there from grow- ing, and the space in growing taken up by a new group moved in from the nursery, and so on. Therefore all buildings in the pro- duction process should be sized to hold an even number of animal groups, with the group size being equal to the number of pigs weaned from one group of sows. For example, the nursery should be sized to hold either one or two groups, not 11/2 groups. Knowing that a new group will need to enter the production pro- cess at the end of each IBF, all the necessary information is available to determine the schedule as soon as the IBF is known. Numerical Solution The limitations of a sow's biological cycle plus swine growth information can be reduced to a set of equations. This allows a producer to calculate an accurate schedule for his operation and to obtain information about the performance of that schedule. This is ideal for modern production-intensive systems and lends itself to computer solution, using a fairly simple pro- gram or spreadsheet. The calculations work especially well for multiple room far- rowing operations. A primary benefit of a worksheet solution is the ability to quickly calculate how well various schedules per- form. Example schedules for five common systems, shown in Tables 2a through 2e, were calculated using the attached worksheet. Figure 1 graphically represents the information from the first example in Table 2a. A second blank schedule chart is provided for the reader's use in Figure 2. Table 3 is a summary of building capacities for various schedules. It is based on 10-crate farrowing rooms, so that capacities can easily be scaled up or down to fit the size of your operation. This summary is not as useful for day to day planning as the schedules shown in Tables 2a through 2e but is very useful for determining facility capacities and should be of interest to farm builders and to producers considering expansion. The procedure for calculations with the worksheet is as fol- lows: The time that sow groups occupy farrowing is computed, and the desired open time is then adjusted to resolve any conflicts in space usage. These calculations begin with the minimum open period that the producer feels is needed between sow groups and the desired maximum weaning age. These values are used to esti- mate the IBF. This estimated interval is then used to compute the number of sow groups. If the number is not whole, it is truncated (it would not make sense to have 3.9 sow groups, for example). Using the new sow group number, the interval is then recomputed. In effect, the worksheet accounts for the sow's bio- logical needs and then adjusts the building schedule accordingly by varying the cleanup period. The period designated as open is really just a time when the farrowing room does not have sows in the process of farrowing or nursing. A portion of this time might be when sows are present before farrowing as well as when the building is being cleaned after weaning. Also, no pig mor- tality or gilts removed for breeding are included in the calcula- tions. Summary The benefits of scheduling are well documented. Modern pork producers must use a disciplined method of controlling animal production and movement through expensive facilities. Scheduling of single or multiple farrowing room systems can be done quickly and easily using the numerical solution outlined here. Furthermore, the calculations lend themselves readily to development of a computer program or spreadsheet that allows the producer to evaluate a wide range of schedules. Worksheet for computing a swine production schedule. Example Situation: A farmer wishes to construct a new farrow-to-finish unit. He is planning to use a one-room, 20- crate farrowing house. He hopes to wean 8 pigs per litter and finish animals in 180 days. Because of other demands on labor, he needs at least 10 days for cleanup in farrowing and will pen breed at first heat. He is willing to use enough boars to be able to use each boar only once a day. His goal is a conception rate of 80%, although he expects this to drop to 67% during sum- mer months because of hot weather breeding problems. Desired minimum and maximum weaning ages are 29 days and 37 days, respec- tively. NOTE: All calculations are done in days. _________________________________________________________________________ Your Example values 1. Farrowing facilities description a. Number of rooms (farrowing or sow-pig nursery): 1 _______ b. Number of crates per room: 20 _______ c. Minimum building open time needed between farrowings: 10 days _______ _________________________________________________________________________ 2. Weaning information a. Desired minimum age: 29 days _______ b. Desired maximum age (at least 7 days greater than minimum age for first heat breeding, 11 days greater for second heat breeding): 37 days _______ c. Average number weaned per litter: 8 _______ _________________________________________________________________________ 3. Breeding information a. Breed on first or second heat? 1st _______ b. Minimum time required after weaning for sows to mate (3 days for first heat and 22 days for second heat breeding): 3 days _______ c. Number of services per boar per day during mating period: 1 _______ d. Average conception rate, %: 80% _______ e. Minimum expected conception rate, %: 67% _______ _________________________________________________________________________ 4. Interval between (successive) farrowings estimate a. Farrowing span: Step 2.b - Step 2.a (37-29) 8 days _______ b. Estimated IBF: Step 1.c + Step 2.b (10+37) 47 days _______ _________________________________________________________________________ 5. Number of sow groups and actual IBF a. Weaning to weaning interval: Step 3.b + Step 2.b + min. gestation period (3+37+113) 153 days_______ b. Total number of sow groups: (Step 5.a x Step 1.a):Step 4.b (((153x1):47)=3.1) 3 _______ Truncate result if not a whole number c. Actual IBF: (Step 5.a x Step 1.a) : Step 5.b ((153x1):3=51) Round off result if not a whole number 51 days _______ d. Number of sow groups per room: Step 5.b : Step 1.a (3:1) 3 _______ e. Actual open period available between farrowings: Step 5.c - Step 2.b (51-37) 14 days _______ f. Age difference between each pig group (time from start of one farrowing to start of next): Step 5.c:Step 1.a (51:1) 51 days _______ _________________________________________________________________________ 6. Breeding herd requirements a. Average number of sows in herd:* (Step 5.b x Step 1.b x 100):Step 3.d ((3x20x100):80) 75 _______ b. Breeding span: Step 4.a - 3 (8-3)- 5 days _______ c. Total number of services per boar per breeding period: Step 3.c x Step 6.b (1x5) 5 _______ d. Sow capacity in breeding: Step 1.b x 100 : Step 3.e (round answer off to next highest whole number) (20x100:67) 30 _______ e. Number of boars required: Step 6.d x number of services per estrus (2) : Step 6.c (round value off to next highest number, e.g., use 9 instead of 8.57) (30 x 2):5 12 _______ f. Time period after weaning by which a sow group must be bred. For first heat, use 3 days to reach estrus after weaning + Step 6.b. For second heat breeding, use 22 days to reach estrus + Step 6.b (3+5) 8 days _______ _________________________________________________________________________ 7. Pig production a. Potential number of litters per sow per year possible: 365 days per year : Step 5.a (365:153) 2.38 _______ b. Average number of litters per sow per year: (Step 7.a x Step 1.b x Step 5. b) : Step 6.a ((2.38x20x3):75) 1.90 _______ c. Maximum number of litters per year for entire herd: Step 1.b x Step 7.a x Step 5. b (Truncate result if not whole number) (20x2.38x3) 143 _______ d. Maximum number of pigs produced per year: (365:Step 5.f) x Step 1.b x Step 2.c ((365:51) x 20 x 8) 1145 _______ e. Average age of pig at market (days): 180 days_______ f. Number of pigs per group: Step 1.b x Step 2.c (20 x 8) 160 _______ g. Number of pig groups from birth to market:= Step 7.e : Step 5.f (round off result to next highest number, i.e., use 4 instead of 3.53) (180:51) 4 _______ h. Upper age bracket of youngest pig group: The smaller of Step 5.f or Step 2.b 37 _______ i. Age bracket of next oldest pig group: [Step 7.h] to [Step 7.h + Step 5.f] (37 to 37+51) 37-88 _______ j. Age ranges for rest of pig groups: [88] to [88 + Step 5.f] 88-139 _______ [139] to [139 + Step 5.f] 139-190 _______ (Continue calculation to maximum age of Step 7.e) _________________________________________________________________________ * By pregnancy checking and culling open sows, not all sow groups need to be multiplied by 1.2 (assuming 80% conception rate). This will decrease the total number of sows in the herd and decrease the capacity needed in gestation accordingly. - Breeding span can be adjusted by modifying minimum weaning age, without significantly affecting other scheduling variables (e.g., lowering minimum weaning age by one day lengthens farrowing span and breeding span by one day). = This value must be rounded off to the next highest number to compute building capacity needed. Notice, however, that higher fractions give a better building utilization than lower frac- tions; 3.9 would be better than 3.5, for example, since space for one group of pigs would be empty one-half the time with 3.5 groups. _________________________________________________________________________ Table 2a. Schedule for 1 room, 14 days open, 3 groups of sows, farrow every 51 days. ________________________________________________________________________ | SWINE SCHEDULING EXAMPLE #1 | | (All table values are in days) | ________________________________________________________________________ | | Enter | Begin | |Breeding Enter | Begin | | | | | |_______________________________ | Group*farrowingfarrowing**Wean|BeginEndNurseryGrowingFinishingmarketing| ________________________________________________________________________ | A1 | 1 | 5 | 42| 45| 49 42 | 93 | 144 | 185 | | B1 | 52 | 56 | 93| 96|100 93 | 144 | 195 | 236 | | C1 | 103 | 107 | 144| 147|151 144 | 195 | 246 | 287 | ________________________________________________________________________ | A2 | 154 | 158 | 195| 198|202 195 | 246 | 297 | 338 | | B2 | 205 | 209 | 246| 249|253 246 | 297 | 348 | 389 | | C2 | 256 | 260 | 297| 300|304 297 | 348 | 399 | 440 | ________________________________________________________________________ | A3 | 307 | 311 | 348| 351|355 348 | 399 | 450 | 491 | | B3 | 358 | 362 | 399| 402|406 399 | 450 | 501 | 542 | | C3 | 409 | 413 | 450| 453|457 450 | 501 | 552 | 593 | ________________________________________________________________________ * This value refers to the sow group and to the pigs produced by that sow group. For example, B3 would stand for the third far- rowing of the second sow group. ** The cleanup or open period of 14 days is divided between 4 days in the building when sows are present before farrowing begins and 10 days after weaning when the building is empty. (Note that once the top row is determined, the rest of the table is easily computed by adding multiples of the IBF of 51 days). - The maximum weaning age will be 37 days (42 minus 5 days open) and the minimum will be 29 days (37 minus 3 days to return to heat minus 5 days (day 45 through day 49) to mate). = The first animals will be ready for market at 180 days of age. Since farrowing began on day 5, this will be day 185. This schedule requires building space for 1 pig group in nursery, 1 group in growing, and 1 group in finishing. Table 2b. Schedule for 1 room, 5 days open, 4 groups of sows, farrow every 37 days. ________________________________________________________________ | SWINE SCHEDULING EXAMPLE #2 | | (All table values are in days) | ________________________________________________________________ | | Farrowing| |Breeding| Enter | Begin | | |___________ |_________________________________ | GroupEnter|BeginWean*Begin|EndNursery GrowingFinishingmarketing| ________________________________________________________________ |A1 | 1 | 3| 35| 38 | 41 35 | 72 | 109 | 183 | |B1 | 38 | 40| 72| 75 | 78 72 | 109 | 146 | 220 | |C1 | 75 | 77| 109| 112 |115 109 | 146 | 183 | 257 | |D1 | 112 | 114| 146| 149 |152 146 | 183 | 220 | 294 | ________________________________________________________________ |A2 | 149 | 151| 183| 186 |189 183 | 220 | 257 | 331 | |B2 | 186 | 188| 220| 223 |226 220 | 257 | 294 | 368 | |C2 | 223 | 225| 257| 260 |263 257 | 294 | 331 | 405 | |D2 | 260 | 262| 294| 297 |300 294 | 331 | 368 | 442 | ________________________________________________________________ |A3 | 297 | 299| 331| 334 |337 331 | 368 | 405 | 479 | |B3 | 334 | 336| 368| 371 |374 368 | 405 | 442 | 516 | |C3 | 371 | 373| 405| 408 |411 405 | 442 | 479 | 553 | ________________________________________________________________ * The maximum weaning age will be 32 days (35 minus 3 days open), and the minimum will be 25 days (32 minus 3 days to return to heat minus 4 days for the group to mate). | This schedule requires building space for 1 pig group in nur- sery, 1 group in growing, and 2 groups in finishing. Table 2c. Schedule for 2 rooms, 11 days open, 7 groups of sows, farrow every 21 days. _______________________________________________________ | SWINE SCHEDULING EXAMPLE #3 | | (All table values are in days) | ________________________________________________________ | |Enter farrowing house| Begin | | Breeding | |Group| 1* | 2 |farrowing|Wean|Begin| End | ________________________________________________________ |A1 | 1 | | 5 | 36 | 39 | 44 | |B1 | | 22 | 26 | 57 | 60 | 65 | |C1 | 43 | | 47 | 78 | 81 | 86 | ________________________________________________________ |D1 | | 64 | 68 | 99 | 102 |107 | |E1 | 85 | | 89 |120 | 123 |128 | |F1 | | 106 | 110 |141 | 144 |149 | ________________________________________________________ |G1 |127 | | 131 |162 | 165 |170 | |A2 | | 148 | 152 |183 | 186 |191 | |B2 |169 | | 173 |204 | 207 |212 | ________________________________________________________ |C2 | | 190 | 194 |225 | 228 |233 | |D2 |211 | | 215 |246 | 249 |254 | |E2 | | 232 | 236 |267 | 270 |275 | ________________________________________________________ |F2 |253 | | 257 |288 | 291 |296 | |G2 | | 274 | 278 |309 | 312 |317 | |A3 |295 | | 299 |330 | 333 |338 | ________________________________________________________ |B3 | | 316 | 320 |351 | 354 |359 | |C3 |337 | | 341 |372 | 375 |380 | |D3 | | 358 | 362 |393 | 396 |401 | ________________________________________________________ |E3 |379 | | 383 |414 | 417 |422 | ________________________________________________________ _________________________________________________ | | SWINE SCHEDULING EXAMPLE #3 (continue) | | | (All table values are in days) | ________________________________________________ | |Enter nursery| Enter | Begin | |Group| 1 | 2 |Growing|Finishing|marketing| ________________________________________________ |A1 | 36 | | 78 | 120 | 185 | |B1 | | 57 | 99 | 141 | 206 | |C1 | 78 | | 120 | 162 | 227 | ________________________________________________ |D1 | | 99 | 141 | 183 | 248 | |E1 | 120 | | 162 | 204 | 269 | |F1 | | 141 | 183 | 225 | 290 | ________________________________________________ |G1 | 162 | | 204 | 246 | 311 | |A2 | | 183 | 225 | 267 | 332 | |B2 | 204 | | 246 | 288 | 353 | ________________________________________________ |C2 | | 225 | 267 | 309 | 374 | |D2 | 246 | | 288 | 330 | 395 | |E2 | | 267 | 309 | 351 | 416 | ________________________________________________ |F2 | 288 | | 330 | 372 | 437 | |G2 | | 309 | 351 | 392 | 458 | |A3 | 330 | | 372 | 414 | 479 | ________________________________________________ |B3 | | 351 | 393 | 435 | 500 | |C3 | 372 | | 414 | 456 | 521 | |D3 | | 393 | 435 | 477 | 542 | ________________________________________________ |E3 | 414 | | 456 | 498 | 563 | ________________________________________________ * There are a total of 11 days open between farrowings (4 days when sows are in the building before farrowing begins and 7 days (43 minus 36) when the building is empty). | This schedule requires building space for 2 groups in nursery (in two rooms), 2 groups in growing, and 3 groups in finishing (assumes pigs are sold at 178 days of age instead of 180). This means selling by the 183rd day in time to accommodate the next group coming from the growing unit. Table 2d. Schedule for 3 rooms, 4 days open, 11 groups of sows, farrow every 14 days. ______________________________________________________ | SWINE SCHEDULING EXAMPLE #4 | | (All table values are in days) | _______________________________________________________ | |Enter farrowing house| Begin | |Breeding | |Group| 1 | 2 | 3 |farrowing|Wean|Begin|End | |-----|------|------|-------|---------|----|-----|----| |A1 | 1 | | | 3 | 41 | 44 | 47 | |B1 | | 15 | | 17 | 55 | 58 | 61 | |C1 | | | 29 | 31 | 69 | 72 | 75 | |-----|------|------|-------|---------|----|-----|----| |D1 | 43 | | | 45 | 83 | 86 | 89 | |E1 | | 57 | | 59 | 97 | 100 |103 | |F1 | | | 71 | 73 |111 | 114 |117 | |-----|------|------|-------|---------|----|-----|----| |G1 | 85 | | | 87 |125 | 128 |131 | |H1 | | 99 | | 101 |139 | 142 |145 | |I1 | | |113 | 115 |153 | 156 |159 | |-----|------|------|-------|---------|----|-----|----| |J1 |127 | | | 129 |167 | 170 |173 | |K1 | |141 | | 143 |181 | 184 |187 | |A2 | | |155 | 157 |195 | 198 |201 | |-----|------|------|-------|---------|----|-----|----| |B2 |169 | | | 171 |209 | 212 |215 | |C2 | |183 | | 185 |223 | 226 |229 | |D2 | | |197 | 199 |237 | 240 |243 | |-----|------|------|-------|---------|----|-----|----| |E2 |211 | | | 213 |251 | 254 |257 | |F2 | |225 | | 227 |265 | 268 |271 | |G2 | | |239 | 241 |279 | 282 |285 | |-----|------|------|-------|---------|----|-----|----| |H2 |253 | | | 255 |293 | 296 |299 | |I2 | |267 | | 269 |307 | 310 |313 | |J2 | | |281 | 283 |321 | 324 |327 | |-----|------|------|-------|---------|----|-----|----| |K2 |295 | | | 297 |335 | 338 |341 | |A3 | |309 | | 311 |349 | 352 |355 | |-----|------|------|-------|---------|----|-----|----| __________________________________________________ | SWINE SCHEDULING EXAMPLE #4 (CONTINUE..) | | (All table values are in days) | ___________________________________________________ | |Enter nursery | Enter | Begin | |Group| 1 | 2 | 3 |Growing|Finishing|marketing*| |-----|----|----|----|-------|---------|----------| |A1 | 41| | | 83 | 125 | 183 | |B1 | | 55| | 97 | 139 | 197 | |C1 | | | 69 | 111 | 153 | 211 | |-----|----|----|----|-------|---------|----------| |D1 | 83| | | 125 | 167 | 225 | |E1 | | 97| | 139 | 181 | 239 | |F1 | | |111 | 153 | 195 | 253 | |-----|----|----|----|-------|---------|----------| |G1 | 125| | | 167 | 209 | 267 | |H1 | | 139| | 181 | 223 | 281 | |I1 | | |153 | 195 | 237 | 295 | |-----|----|----|----|-------|---------|----------| |J1 | 167| | | 209 | 251 | 309 | |K1 | | 181| | 223 | 265 | 323 | |A2 | | |195 | 237 | 279 | 337 | |-----|----|----|----|-------|---------|----------| |B2 | 209| | | 251 | 293 | 351 | |C2 | | 223| | 265 | 307 | 365 | |D2 | | |237 | 279 | 321 | 379 | |-----|----|----|----|-------|---------|----------| |E2 | 251| | | 293 | 335 | 393 | |F2 | | 265| | 307 | 349 | 407 | |G2 | | |279 | 321 | 363 | 421 | |-----|----|----|----|-------|---------|----------| |H2 | 293| | | 335 | 377 | 435 | |I2 | | 307| | 349 | 391 | 449 | |J2 | | |321 | 363 | 405 | 463 | |-----|----|----|----|-------|---------|----------| |K2 | 335| | | 377 | 419 | 477 | |A3 | | 349| | 391 | 433 | 491 | |-----|----|----|----|-------|---------|----------| * This schedule requires building space for 3 groups in nursery (in three separate rooms), 3 groups in growing, and 4 groups in finishing (5 unless pigs are sold at 178 days of age to accommo- date the group coming from the growing unit on the 181st day. Table 2e. Schedule for 5 rooms, 4 days open, 21 groups of sows, farrow every 7 days. _________________________________________________________ | SWINE SCHEDULING EXAMPLE #5 | | (All table values are in days) | |-----|----|----|----|----|----|---------|----|-----|---| | |Enter farrowing house | Begin | |Breeding | |Group| 1 | 2 | 3 | 4 | 5 |farrowing|Wean|Begin|End| |-----|----|----|----|----|----|---------|----|-----|---| |A1 | 1| | | | | 3 | 34 | 37 | 40| |B1 | | 8| | | | 10 | 41 | 44 | 47| |C1 | | | 15| | | 17 | 48 | 51 | 54| |-----|----|----|----|----|----|---------|----|-----|---| |D1 | | | | 22| | 24 | 55 | 58 | 61| |E1 | | | | | 29 | 31 | 62 | 65 | 68| |F1 | 36| | | | | 38 | 69 | 72 | 75| |-----|----|----|----|----|----|---------|----|-----|---| |G1 | | 43| | | | 45 | 76 | 79 | 82| |H1 | | | 57| | | 52 | 83 | 86 | 89| |I1 | | | | 57| | 59 | 90 | 93 | 96| |-----|----|----|----|----|----|---------|----|-----|---| |J1 | | | | | 64 | 66 | 97 | 100 |103| |K1 | 71| | | | | 73 |104 | 107 |110| |L1 | | 78| | | | 80 |111 | 114 |117| |-----|----|----|----|----|----|---------|----|-----|---| |M1 | | | 85| | | 87 |118 | 121 |124| |N1 | | | | 92| | 94 |125 | 129 |131| |O1 | | | | | 99 | 101 |132 | 135 |138| |-----|----|----|----|----|----|---------|----|-----|---| |P1 | 106| | | | | 108 |139 | 142 |145| |Q1 | | 113| | | | 115 |146 | 149 |152| |R1 | | | 127| | | 122 |153 | 156 |159| |-----|----|----|----|----|----|---------|----|-----|---| |S1 | | | | 127| | 129 |160 | 163 |166| |T1 | | | | |134 | 136 |167 | 170 |173| |U1 | 141| | | | | 143 |174 | 177 |180| |-----|----|----|----|----|----|---------|----|-----|---| |A2 | | 148| | | | 150 |181 | 184 |187| |B2 | | | 155| | | 157 |188 | 191 |194| |-----|----|----|----|----|----|---------|----|-----|---| ___________________________________________________ | SWINE SCHEDULING EXAMPLE #5 (CONTINUE..) | | (All table values are in days) | |-----|---|---|---|---|-------|---------|----------| | |Enter nursery | Enter | Begin | |Group| 1 | 2 | 3 | 4 |Growing|Finishing|marketing*| |-----|---|---|---|---|-------|---------|----------| |A1 | 34| | | | 62 | 125 | 183 | |B1 | | 41| | | 69 | 132 | 190 | |C1 | | | 48| | 76 | 139 | 197 | |-----|---|---|---|---|-------|---------|----------| |D1 | | | | 55| 83 | 146 | 204 | |E1 | 62| | | | 90 | 153 | 211 | |F1 | | 69| | | 97 | 160 | 218 | |-----|---|---|---|---|-------|---------|----------| |G1 | | | 76| | 104 | 167 | 225 | |H1 | | | | 83| 111 | 174 | 232 | |I1 | 90| | | | 118 | 181 | 239 | |-----|---|---|---|---|-------|---------|----------| |J1 | | 97| | | 125 | 188 | 246 | |K1 | | |104| | 132 | 195 | 253 | |L1 | | | |111| 139 | 202 | 260 | |-----|---|---|---|---|-------|---------|----------| |M1 |118| | | | 146 | 209 | 267 | |N1 | |125| | | 153 | 216 | 274 | |O1 | | |132| | 160 | 223 | 281 | |-----|---|---|---|---|-------|---------|----------| |P1 | | | |139| 167 | 230 | 288 | |Q1 |146| | | | 174 | 237 | 295 | |R1 | |153| | | 181 | 244 | 302 | |-----|---|---|---|---|-------|---------|----------| |S1 | | |160| | 188 | 251 | 309 | |T1 | | | |167| 195 | 258 | 316 | |U1 |174| | | | 202 | 265 | 323 | |-----|---|---|---|---|-------|---------|----------| |A2 | |181| | | 209 | 272 | 330 | |B2 | | |188| | 216 | 279 | 337 | |-----|---|---|---|---|-------|---------|----------| * This schedule requires building space for 3 groups in each nur- sery room, 9 groups in growing, and 8 groups in finishing (if pigs are sold at 178 days of age, 9 groups otherwise). Table 3. Summary design table of building capacities needed per 10 sows farrowed per period (80% average conception rate).* (Available in hard copy) Figure 1. Example from Table 2a, represented graphically. (Not available through electronic copy. Available only in hard copy.) Figure 2. This blank schedule is provided for your use. (Not available through electronic copy. Available only in hard copy.) 11/87 (5M) ______________________________________________ Cooperative Extension Work in Agriculture and Home Economics, State of Indiana, Purdue University and U.S. Department of Agri- culture Cooperating. H.A. Wadsworth, Director, West Lafayette, IN. Issued in furtherance of the Acts of May 8 and June 30, 1914. It is the policy of the Cooperative Extension Service of Purdue University that all persons shall have equal opportunity and access to our programs and facilities. .